My Productive Linux Setup

Zenmap is the official cross-platform GUI for the Nmap Security Scanner. It is free and runs on Linux, Windows, Mac OS X, etc. Zenmap aims to make Nmap easy for beginners to use while providing advanced features for experienced Nmap users. Frequently used scans can be saved as profiles to make them easy to run repeatedly. A command creator allows interactive creation of Nmap command lines. Scan results can be saved and viewed later. Saved scan results can be compared with one another to see how they differ. The results of recent scans are stored in a searchable database.

An open source note taking and to-do application with synchronisation capabilities.

Open-source tool for writers. With outliner, character management, plot development, distraction-free editor, etc.

wxHexEditor is an open source cross-platform disk/sector/file hex editor written in C++ with a wxWidgets-based user interface.

Main features:

• low memory usage
• huge file/disk support (up to 2^64 bytes)
• raw disk access
• no temp files
• UTF8/Unicode text search
• file compare
• MD/RIPEMD/SHA/Tiger/HAVAL/CRC/Adler/GOST/Whirlpool/Snefru hash generator
• udis86 x86 disassembler

DBeaver - Universal Database Manager and SQL Client. DBeaver is free and open source (GPL) universal database tool for developers and database administrators.

Usability is the main goal of this project, program UI is carefully designed and implemented.
It is based on open source framework and allows writing of various extensions (plugins).
It supports any database having a JDBC driver.
It may handle any external data source which may or may not have a JDBC driver.
There is a set of plugins for certain databases (MySQL, DB2, PostgreSQL, Oracle, MongoDB, Cassandra and Redis in version 3.x) and different database management utilities (ER diagrams, data migration, metadata editors, etc).

Powerful yet simple to use free and opensource screenshot software for Linux and Windows.

Redshift adjusts the color temperature according to the position of the sun. A different color temperature is set during night and daytime.

During twilight and early morning, the color temperature transitions smoothly from night to daytime temperature to allow your eyes to slowly adapt. At night the color temperature should be set to match the lamps in your room. This is typically a low temperature at around 3000K-4000K. During the day, the color temperature should match the light from outside, typically around 5500K-6500K. The light has a higher temperature on an overcast day.

A color picker and color scheme creation tool.

Features:
Create palettes from images
, Color scheme creation tools
, Fast color picking
, Magnification
, Colors automatically named - Closest color name is found using CIE94 color difference function, which is closer to the way humans interpret color differences, than difference of red, green and blue color amounts.

Export to following formats:
Inkscape/Gimp Palette (.gpl)
, Adobe Swatch Exchange (.ase)
, Alias/WaveFront Material (*.mtl)

Import from following formats:
Inkscape/Gimp Palette (.gpl)
, Adobe Swatch Exchange (.ase)

Picked colors can be copied to clipboard in multiple formats
Hexadecimal notation - #rrggbb
, Functional RGB notation - rgb(red, green, blue)
, Functional HSL notation - hsl(hue, saturation, lightness)

Custom conversions can be done, but requires some Lua language knowledge.
Oversampling with five falloff types.
Multiple pixel values are averaged to help picking colors from sources with noise, patterns and etc, where each pixel is different and overall color is produced by different amounts of particular color
Mix two or more colors using variable number of steps and different mixing types.
Create lightness and/or saturation variations.
Create harmonious colors.
Create color schemes.

Works fine, it is not discontinued. You can check at their github page.

Great search application.

A simple and elegant clock application. It includes world clocks, alarms, a stopwatch and a timer.

Goals:

• Show the time in different cities around the world
• Set alarms to wake you up
• Measure elapsed time with an accurate stopwatch
• Set timers to properly cook your food

Screenkey is a screencast tool to display your keys inspired by Screenflick for Mac OS and based initially on Key-mon project.
It's useful to create screencasts and is also a powerful teaching tool.

Furius ISO Mount is a simple Gtk+ Interface to Mount ISO, IMG, BIN, MDF and NRG Image files without burning to disk.

An ISO, IMG, BIN, MDF and NRG Image management utility for the Gnome Desktop Environment.

Features

Automatically Mounts ISO, IMG, BIN, MDF and NRG Image Files.
Automatically creates a mount point in your home directory.
Automatically Unmounts the Image files.
Automatically removes the mount directory to return your home directory to its previous state.
Automatically saves the history of the last 10 images mounted.
Mounts multiple images.
Burn ISO and IMG Files to optical disk.
Generate Md5 and SHA1 checksums.
Automatically retrieves any previously unmounted images.
Automatically generates a log file of all commands needed to mount and unmount images manually.
Includes Greek, Spanish, Italian, Russian, Chinese and Polish translations.

Binary releases of Visual Studio Code without Microsoft branding, telemetry and licensing.

Curtail (previously ImCompressor) is a useful image compressor, supporting PNG and JPEG file types. It support both lossless and lossy compression modes with an option to whether keep or not metadata of images. It is inspired by Trimage and Image-Optimizer.

Supported formats: PNG, JPEG

This application is a basic image editor, similar to Microsoft Paint, but aiming at the GNOME desktop.

PNG, JPEG and BMP files are supported.

GIMP is a free program for such photo retouching, image composition and image authoring. Essentially it's the closest thing to Photoshop you can get for free.

Wireshark is the world's foremost network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network. It is the de facto (and often de jure) standard across many industries and educational institutions.

Wireshark has a rich feature set which includes the following:

-Deep inspection of hundreds of protocols, with more being added all the time
-Live capture and offline analysis
-Standard three-pane packet browser
-Multi-platform: Runs on Windows, Linux, OS X, Solaris, FreeBSD, NetBSD, and many others
-Captured network data can be browsed via a GUI, or via the TTY-mode TShark utility
-The most powerful display filters in the industry
-Rich VoIP analysis
-Read/write many different capture file formats: tcpdump (libpcap), Pcap NG, Catapult DCT2000, Cisco Secure IDS iplog, Microsoft Network Monitor, Network General Sniffer® (compressed and uncompressed), Sniffer® Pro, and NetXray®, Network Instruments Observer, NetScreen snoop, Novell LANalyzer, RADCOM WAN/LAN Analyzer, Shomiti/Finisar Surveyor, Tektronix K12xx, Visual Networks Visual UpTime, WildPackets EtherPeek/TokenPeek/AiroPeek, and many others
-Capture files compressed with gzip can be decompressed on the fly
-Live data can be read from Ethernet, IEEE 802.11, PPP/HDLC, ATM, Bluetooth, USB, Token Ring, Frame Relay, FDDI, and others (depending on your platform)
-Decryption support for many protocols, including IPsec, ISAKMP, Kerberos, SNMPv3, SSL/TLS, WEP, and WPA/WPA2
-Coloring rules can be applied to the packet list for quick, intuitive analysis
-Output can be exported to XML, PostScript®, CSV, or plain text

Pidgin is an easy to use, multi-protocol chat client client used by millions. Connect to AIM, MSN, Yahoo, XMPP, and more chat networks all at once. It has built-in support for NSS, offering client-to-server message encryption for protocols that support it. The program is extendable through plugins, including "Off-the-Record Messaging" and Pidgin encryption, providing end-to-end message encryption.

KDE Connect is a project that aims to communicate all your devices. For example, with KDE Connect you can receive your phone notifications on your computer, or just use your phone as a remote control for your desktop. To achieve this, KDE Connect implements a secure communication protocol over the network, and allows any developer to create plugins on top of it. Currently there are KDE Connect clients on KDE, Android and Blackberry, and soon we will support iPhone as well.

GNS3 is a graphical network simulator that allows simulation of complex networks.

To provide complete and accurate simulations, GNS3 is strongly linked with:

Dynamips, a Cisco IOS emulator.
Qemu, a generic and open source machine emulator and virtualizer.
VirtualBox, a free and powerful virtualization software.
GNS3 is an excellent complementary tool to real labs for network engineers, administrators and people wanting to study for certifications such as Cisco CCNA, CCNP, CCIP and CCIE as well as Juniper JNCIA, JNCIS and JNCIE.

It can also be used to experiment features of Cisco IOS, Juniper JunOS or to check configurations that need to be deployed later on real routers.

Thanks to VirtualBox integration, now even system engineers and administrators can take advantage of GNS3 to study Redhat (RHCE, RHCT), Microsoft (MSCE, MSCA), Novell (CLP) and many other vendor certifications.

This project is an open source, free program that may be used on multiple operating systems, including Windows, Linux, and MacOS X.

Convert videos to formats that work on your mobile phone, tablet, TV media player, game console, computer, or web browser.

LibreOffice is a powerful office suite – its clean interface and feature-rich tools help you unleash your creativity and enhance your productivity.

Calibre is a free and open source e-book library management application made by users, for users. Many languages, designed around the concept of the logical book, i.e., a single entry in your library that may correspond to actual e-book files in several formats.

Calibre can sort the books in your library by title, author, date added, date published, size, rating, or series, along with extra metadata such as tags and personal comments. You can easily search your book collection for a particular book, based on any of this information. Calibre can also go onto the internet to find online books based on existing title/author or ISBN information.

In addition, Calibre also:
-syncs to your ebook reader
-downloads news from the internet and converts it into ebook form
-offers a ebook viewer that can display all major ebook formats

Features:

Library Management
E-book conversion
Syncing to e-book reader devices
Downloading news from the web and converting it into e-book form
Built-in e-book viewer
Content server for online access to your book collection
E-book editor for the major e-book formats

A simple and modern GTK eBook viewer, built with GJS and Epub.js.

Features
View EPUB files
Two-page view and scrolled view
Customize font and line-spacing
Light, sepia, dark, and invert mode
Reading progress slider with chapter marks
Bookmarks and annotations
Find in book
Quick dictionary lookup
Touchpad gestures: use two-finger swipe to turn the page

View EPUB files. Foliate is based on Epub.js, and supports both two-page view and scrolled view. Customize font and line-spacing. Choose between light, sepia, dark, and invert mode.

Easy navigation. View the table of contents, or use the find in book feature. Reading progress slider with chapter marks makes it easy to find your way through the book.

Quick dictionary lookup. Foliate uses metadata included in the eBook to determine which language to lookup. This feature is powered by Wiktionary, the free dictionary.

Add bookmarks, highlights, and notes. Foliate stores your reading progress, bookmarks, and annotations in your XDG data directory as plain JSON files, so you can export or sync them easily.

A GNOME utility for dealing with storage devices.

• Create and restore disk images. Perform low-level copies and attach disk images as virtual loop devices.
• Partitionize and format disks. Common filesystems and encryption (LUKS) are supported.
• Inspect drive speed and health status. GNOME notifies you if disks fail with critical SMART values.

TimeShift for Linux is an application that provides functionality similar to the System Restore feature in Windows and Time Machine tool in Mac OS. TimeShift protects your system by taking incremental snapshots of file system at regular intervals.

VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL) version 2.

Presently, VirtualBox runs on Windows, Linux, Macintosh, and Solaris hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista, Windows 7, Windows 8, Windows 10), DOS/Windows 3.x, Linux (2.4, 2.6, 3.x and 4.x), Solaris and OpenSolaris, OS/2, and OpenBSD.

Virtualbox is available in 28 languages.

Evolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality.

Clipboard manager with searchable and editable history.

It's possible to save plain text, images, HTML and other formats, use plugins, filter out content by text, data format or window from which it is copied, use multiple tabs, control application using command-line interface and scripting, assign system-wide shortcuts, paste item into application just by selecting it in tray menu and more.

Discord is about giving people the power to create belonging in their lives. We want to make it easier for you to talk regularly with the people you care about. We want you to build genuine relationships with your friends and communities close to home or around the world. Original, reliable, playful, and relatable. These are the values that connect our users and our employees at Discord.

Open source and copyleft remote desktop client for Linux and BSD that supports plugins.

Best.