Libre and powerful
Libre, therefore open-source powerful software.
Ultra-small, ultra-fast, exceptional PDF rendering solution.
MuPDF is a highly versatile, customizable PDF, XPS, and eBook interpreter solution that can be used across a wide range of applications as a PDF renderer, viewer, or toolkit. A few of our interactive features include digital signatures, PDF redactions, form filling, annotations, and page manipulation.
The MuPDF SDK is designed for easy implementation and immediate productivity for developers, making it a perfect fit for mobile browsers, eBooks, and embedded applications where speed and quality are key. MuPDF supports the widest range of document input and output formats in today's market.
There are several versions of MuPDF consisting of a software library, command-line tools, and viewers for various platforms. The viewers can be downloaded from Google Play and the App Store. The SDK can be licensed from Artifex for commercial use or under the AGPL for open source use.
MuPDF runs on a wide range of operating systems including Android, iOS, Windows, macOS, Linux, and Unix-like systems. We added language bindings for Java, C++, and Python, as well as Web Viewers powered by WebAssembly.
FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. It supports the most obscure ancient formats up to the cutting edge. No matter if they were designed by some standards committee, the community or a corporation. It is also highly portable: FFmpeg compiles, runs, and passes our testing infrastructure FATE across Linux, Mac OS X, Microsoft Windows, the BSDs, Solaris, etc. under a wide variety of build environments, machine architectures, and configurations.
It contains libavcodec, libavutil, libavformat, libavfilter, libavdevice, libswscale and libswresample which can be used by applications. As well as ffmpeg, ffplay and ffprobe which can be used by end users for transcoding and playing.
The FFmpeg project tries to provide the best technically possible solution for developers of applications and end users alike. To achieve this we combine the best free software options available. We slightly favor our own code to keep the dependencies on other libs low and to maximize code sharing between parts of FFmpeg. Wherever the question of "best" cannot be answered we support both options so the end user can choose.
Everyone is welcome in FFmpeg and all contributions are welcome too. We are happy to receive patches, pull requests, bug reports, donations or any other type of contribution.
Security is a high priority and code review is always done with security in mind. Though due to the very large amounts of code touching untrusted data security issues are unavoidable and thus we provide as quick as possible updates to our last stable releases when new security issues are found.
MPV is an audio and movie player based on MPlayer and mplayer2. It supports a wide variety of video file formats, audio and video codecs, and subtitle types. It shares some features with the former projects while introducing many more.
- Streamlined CLI options MPlayer's options parser was improved to behave more like other CLI programs, and many option names and semantics were reworked to make them more intuitive and memorable.
- On Screen Controller While mpv has no official GUI, it has a small controller that is triggered by mouse movement.
- High quality video output mpv has an OpenGL based video output that is capable of many features loved by videophiles, such as video scaling with popular high quality algorithms, color management, frame timing, interpolation, and more.
- GPU video decoding mpv leverages the FFmpeg hwaccel APIs to support VDPAU, VAAPI, DXVA2, VDA and VideoToolbox video decoding acceleration.
- Embeddable A straightforward C API was designed from the ground up to make mpv usable as a library and facilitate easy integration into other applications.
PeerTube is a free, decentralized and federated video platform developed as an alternative to other platforms that centralize our data and attention, such as YouTube, Dailymotion or Vimeo. But one organization hosting PeerTube alone may not have enough money to pay for bandwidth and video storage of its servers, all servers of PeerTube are interoperable as a federated network, and non-PeerTube servers can be part of the larger Vidiverse (federated video network) by talking our implementation of ActivityPub. Video load is reduced thanks to P2P (BitTorrent) in the web browser via WebTorrent.
Video streaming Just upload your videos, and be sure they will stream anywhere. Add a description, some tags and your video will be discoverable by the entire video fediverse, not just your instance. You can even embed a player on your favorite website!
Keep in touch with video creators Follow your favorite channels from PeerTube or really any other place. No need to have an account on the instance you watched a video to follow its author, you can do all of that from the Fediverse (Mastodon, Pleroma…), or just with RSS.
An interface to call home Be it as a user or an instance administrator, you can decide what your experience will be like. Don't like the colors? They are easy to change. Don't want to list videos of an instance but let your users subscribe to them? Don't like the regular web client? All of that can be changed, and much more. No UX dark pattern, no mining your data, no video recommendation bullshit.
Communities that help each other In addition to visitors using WebTorrent to share the load among them, instances can help each other by caching one another's videos. This way even small instances have a way to show content to a wider audience, as they will be shouldered by friend instances. Content creators can get help from their viewers in the simplest way possible: a support button showing a message linking to their donation accounts or really anything else.
x264 is a free software library for encoding video streams into the H.264/MPEG-4 AVC format.
8x8 and 4x4 adaptive spatial transform Adaptive B-frame placement B-frames as references / arbitrary frame order CAVLC/CABAC entropy coding Custom quantization matrices Intra: all macroblock types (16x16, 8x8, 4x4, and PCM with all predictions) Inter P: all partitions (from 16x16 down to 4x4) Inter B: partitions from 16x16 down to 8x8 (including skip/direct) Interlacing (MBAFF) Multiple reference frames Ratecontrol: constant quantizer, constant quality, single or multipass ABR, optional VBV Scenecut detection Spatial and temporal direct mode in B-frames, adaptive mode selection Parallel encoding on multiple CPUs Predictive lossless mode Psy optimizations for detail retention (adaptive quantization, psy-RD, psy-trellis) Zones for arbitrarily adjusting bitrate distribution
Krita is a complete creative sketching and painting application with advanced, commercial quality features. It's open-source and available across all major desktop platforms. Krita is free on the official website and paid on Steam and Microsoft Store: the money will support Krita development.
User Interface - An intuitive user interface that stays out of your way. The dockers and panels can be moved and customized for your specific workflow. Once you have your setup, you can save it as your own workspace. You can also create your own shortcuts for commonly used tools.
Pop-up Palette - Quickly pick your color and brush by right-clicking on the canvas.
Brush Stabilizers - Have a shaky hand? Add a stabilizer to your brush to smoothen it out.
Brush Engines - Customize your brushes with 9 unique brush engines.
Wrap-around mode - It is easy to create seamless textures and patterns now. Press the ‘W’ key while painting to toggle wrap-around mode.
Resource Manager - Import brush and texture packs from other artists to expand your tool set.
Layer Management - Krita comes with vector, filter, group, and file layers. Combine, order, and flatten layers to keep organized. Add drop shadows and other simple effects using visual styles.
Full Color Management - Krita supports full color management through LCMS for ICC and OpenColor IO for EXR, allowing you to incorporate Krita into your existing color management pipeline.
Terminator enables the user to run and manage multiple terminal emulators side-by-side in the same window. The main focus is arranging terminals in a grid. (Tabs is the most common default method, which Terminator also supports.) It is inspired by such programs as gnome-multi-term and quadkonsole.
OBS Studio (also known as Open Broadcaster Software, or OBS) is a screen-casting and live-streaming software available across multiple platforms including macOS, Windows and Linux. Boasting features typically only found in commercial screen recording apps, OBS also provides one of the simplest workflows with an intuitive and easy-to-learn interface that makes recording and streaming a breeze. It's also totally free and open-source.
With its long standing history of continued updates and considering its ease of use and free cost, it's no wonder OBS is one of the most popular and highest recommended apps for screen-casting and live streaming.
Cross-platform (available for Mac, Windows and Linux). Encoding using H264 (x264) and AAC. Support for Intel Quick Sync Video (QSV), AMF and NVENC. Unlimited number of scenes and sources. Live RTMP streaming to Twitch, YouTube, Mixer, DailyMotion, Smashcast and more. File output to MP4, MKV or FLV. GPU-based game capture for high performance game streaming. DirectShow capture device support (webcams, capture cards, etc). Windows 8 high speed monitor capture support. Bilinear or lanczos3 resampling. Light and dark themes to support various working conditions and preferences.
The Kate project develops two main products: KatePart, the advanced editor component which is used in numerous KDE applications requiring a text editing component, and Kate, a MDI text editor application. In addition, we provide KWrite, a simple SDI editor shell which allows the user to select his/her favourite editor component.
Kate is a multi-document editor part of KDE since release 2.2. Being a KDE application, Kate ships with network transparency, as well as integration with the outstanding features of KDE. Choose it for viewing HTML sources from konqueror, editing configuration files, writing new applications or any other text editing task. You still need just one running instance of Kate.
With a multi-view editor like Kate you get a lot of advantages. You can view several instances of the same document and all instances are synchronized. Or you can view more files at the same time for easy reference or simultaneous editing.
KWrite is a simple text editor application, allowing you to edit one file at the time per window. As Kate, KWrite uses the editor component KatePart.KWrite simply provides the selected editor component with a window frame, and lets you open and save documents. KWrite shares all features the KatePart provides, look here to get an overview. Licensing
Kate is released under the GNU Lesser General Public License (LGPL) Version 2 Kate is part of the KDE project. How to get the entire source code is described in the article Get It.
Supports a large number of file systems, including ext2/3/4, btrfs, reiserfs, NTFS, FAT16/32, JFS, XFS and more. Makes use of already available external programs to get its job done.
LibreOffice is a free and open-source office suite that is compatible with other major office suites, and is available on all operating systems. It is an independently-developed version of the OpenOffice.org suite.
The office suite includes:
LibreOffice - Writer, a word processor with similar functionality and file support to Microsoft Word . It has extensive WYSIWYG word processing capabilities, but can also be used as a basic text editor.
LibreOffice - Calc , a spreadsheet program, similar to Microsoft Office Excel . It has a number of unique features, including a system which automatically defines series of graphs, based on information available to the user.
LibreOffice - Draw , a vector graphics editor and diagramming tool similar to Microsoft Office Visio . It provides connectors between shapes, which are available in a range of line styles and facilitate building drawings such as flowcharts. It also includes features similar to desktop publishing software such as Scribus and Microsoft Office Publisher .
Wine is a free, open source application for running Windows software on operating systems that are normally not supported. With Wine, you can install and run these applications just like you would in Windows.
A Vulkan-based translation layer for D3D9, D3D10 and D3D11, which can be used on Linux with Wine.
Currently unsupported features: D3D11: Shared Resources. D3D11: Class linkage. D3D11: Predication. D3D11.1: Target-independent rasterization (behaves incorrectly; no MSAA16x support). D3D11.2: Tiled resources (optional). D3D11.3: Rasterizer Ordered Views (optional). D3D11.4: D3D12 interop.
Notes on Vulkan drivers Before reporting an issue, please check the Wiki page on the current driver status and make sure you run a recent enough driver version for your hardware.
DXVK can be used to monitor performance with DXVK_HUD: https://github.com/doitsujin/dxvk#hud
Lutris is an open source gaming platform for GNU/Linux. It allows you to gather and manage (install, configure and launch) all your games acquired from any source, in a single interface.
- Manage your Linux games, Windows games, emulated console games and browser games
- Launch your Steam and Desura games
- Community-written installers to ease up your games' installation
- More than 20 emulators installed automatically or in a single click, providing support for most gaming systems from the late 70's to the present day
- Download and play libre and freeware games
Plasma is the KDE workspace. Actually it is a technology that can adapt to many types of devices. Currently there are two varieties of Plasma: The Plasma Desktop environment which is the focus of the majority of our pages and Plasma Mobile, the new cool environment for pads and smartphones.
An important part of Plasma are the "widgets". Widgets are the individual units of the desktop and they include (although they are not limited to) the application menu, icons, the system tray, the clock, etc. Widgets can exist on the desktop itself, or be inserted into the panel, on the screen saver or on the dashboard among other places. Widgets exist for a large number of tasks besides usual desktop helpers, including microblogging (Twitter, identi.ca), unit conversion calculators, weather forecasts, file sharing and much more. Panels and desktops are also special kinds of widgets themselves, meant to contain other widgets.