Firefox

Mozilla Firefox, or simply Firefox, is a free and open-source web browser developed by the Mozilla Foundation and its subsidiary, Mozilla Corporation. Firefox is officially available for Windows 7 or ...
Language(s): C++, JavaScript, HTML, C, Rust
Operating system(s): Linux, mac OS: OS X 10.9 or later, Windows 7 or later, Android Jelly Bean or later, iOS 11 or later, FreeBSD, OpenBSD, NetBSD, illumos, Solaris
License: Mozilla Public License (MPL) 2.0

Firestarter

Firestarter is a personal firewall tool that uses the Netfilter (iptables/ipchains) system built into the Linux kernel. It has the ability to control both inbound and outbound connections. Firestarter...
Language(s): N/A
Operating system(s): Linux
License: GNU General Public License

Flex

Flex is a free and open-source software alternative to lex. It is a computer program that generates lexical analyzers (also known as "scanners" or "lexers"). It is frequently used as the lex implement...
Language(s): C and C++
Operating system(s): Unix, Linux
License: BSD license

FlightGear

FlightGear Flight Simulator (often shortened to FlightGear or FGFS) is a free, open source multi-platform flight simulator developed by the FlightGear project since 1997....
Language(s): C++, C
Operating system(s): Windows, Linux, Mac OS, FreeBSD, Solaris, IRIX
License: GNU General Public License

Flowblade

Flowblade Movie Editor is a free and open-source video editing software for Linux. The project was started by lead developer Janne Liljeblad in 2009 and has been active since. The source code is cu...
Language(s): Python (GTK)
Operating system(s): Linux
License: GNU General Public License