For Windows

Mozilla Firefox (known simply as Firefox) is a free and open source web browser descended from the Mozilla Application Suite. Firefox is highly extensible, with thousands of third-party add-ons available.

Firefox version 60+ (Quantum) is presently faster than Google Chrome and use less memory than Chrome. Compare to previous versions of Firefox, the Quantum version is twice as fast, promote parallelism, and has more intuitive user interface.

A free and open source password manager that keeps all of your passwords safe in one place.

Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.

It supports POP (storing mail locally on your hard drive so that it can be accessed without an internet connection), and IMAP. It features excellent mail filter capabilities and management.

Thunderbird has strong support for using multiple accounts and identities, including automated signature features.

Chat functionality is built in, so you can enjoy real-time conversation with your contacts, right from your favorite messaging application, with multiple supported networks. Thunderbird makes it easy to search through both past conversations and received emails.

Thunderbird can also function as an RSS/Atom feed reader, and has a large selection of add-ons that extend it with calendar support, PGP support, integration with online services and much more.

Available also as portable app: http://portableapps.com/apps/internet/thunderbird_portable

A command-line installer for Windows.

File and folder lookup tool that searches across local, removable, and network mapped drives.

Software that makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.

7-Zip is a file archiver with a high compression ratio.

The main features of 7-Zip

High compression ratio in 7z format with LZMA and LZMA2 compression
Supported formats:
Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR and Z.
For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
Strong AES-256 encryption in 7z and ZIP formats
Self-extracting capability for 7z format
Integration with Windows Shell
Powerful File Manager
Powerful command line version
Plugin for FAR Manager
Localizations for 87 languages

7-Zip works in Windows 10 / 8 / 7 / Vista / XP / 2012 / 2008 / 2003 / 2000 / NT. There is a port of the command line version to Linux/Unix.

AutoHotkey is a free, open-source scripting language for Windows that allows users to easily create small to complex scripts for all kinds of tasks such as: form fillers, auto-clicking, macros, etc.

Popular and efficient blocker for Chromium, Chrome, Edge, Firefox (desktop and Android), Opera, Thunderbird. Fast and lean.

WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.

Sumatra PDF is a slim, free, open-source PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI/FB2 viewer for Windows.
Why another PDF reader?

Sumatra has a minimalistic design. Simplicity has a higher priority than a lot of features.

Its small and starts up very fast.

Its designed for portable use: its just one file with no external dependencies so you can easily run it from external USB drive.

Free and full-featured media player with seamless, high-quality audio playback and comprehensive format support.

Spotify is a freemium music streaming service providing digital rights management-restricted content from record labels including Sony, EMI, Warner Music Group and Universal.

Music can be browsed by artist, album, genre, playlist, or record label, as well as by direct searches. On computers, a link allows the listener to purchase selected material via partner retailers.

Spotify music streaming is available on all mobile devices and on desktop computers for unlimited durations. Features like offline listening and ad-free playback are only available for Premium subscribers of the service.

Lyrics plugin software for iTunes, Windows Media Player, Winamp, etc. You do not need to change the way you enjoy music. Display scrolling lyrics, you can follow along with the artist and catch every word. Automatically search and download lyrics. Huge lyrics database, and it is expanding everyday. Compatibility with 21 players. Nag-banner in free version

Inkscape is a professional vector graphics editor for Linux, Windows and macOS. It's free and open source.

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.

Professional, open-source raster graphics editor with advanced digital painting and sketching tools and workflow features.

MPC-HC is an extremely light-weight, open source media player for Windows. It supports all common video and audio file formats available for playback.

The tool was developed by mpc-hc.org until July 2017, when it announced its last release due to lack of active developers. The project has been forked by one of the former co-devs, clsid2, that continued the development with new releases since early 2018.

Lightweight
Watch movies on any SSE2 CPU, even on your old computer back from 2000.

Customizable
With its wide array of options, MPC-HC can be customized to fit almost any needs. Among other things, we added custom toolbars.

All around player
MPC-HC can also be used as DVB player.

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

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

Python-based music tagging software with CD lookup and AcoustID to effortlessly ID music.

JDownloader simplifies and improves the process of downloading files from sites like YouTube or Mega.
JDownloader offers downloading in multiple parallel streams, CAPTCHA recognition, and automatic file extraction. It support CCF, RSDF and DLC files.

Cross-platform Python and Django IDE with on-the-fly code analysis and code quality tools, graphical debugger, VCS integration and more.

Enjoy productive PHP and web development with PhpStorm.
Take advantage of deep code understanding, top-notch coding assistance, and support for all major tools and frameworks.

Code combines the streamlined UI of a modern editor with rich code assistance and navigation, and an integrated debugging experience – without the need for a full IDE.

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

A free, open-source Integrated Development Environment for software developers. You get all the tools you need to create professional desktop, enterprise, web, and mobile applications with the Java language, C/C++, and even dynamic languages such as PHP, JavaScript, Groovy, and Ruby. NetBeans IDE is easy to install and use straight out of the box and runs on many platforms including Windows, Linux, Mac OS X and Solaris.
The download section conveniently offers prepackaged bundles/installers for each supported programming language containing only required plugins.

Lets you view and edit data from MariaDB, MySQL, Microsoft SQL, or PostgreSQL databases.