Feather Linux
Lightweight KNOPPIX-based Live-CD that fits in under 64Mb.
Fedora
Community-supported open source distribution. fetchmail
Full-featured and robust remote-mail retrieval and forwarding utility. FFmpeg
Record, convert and stream audio and video. FFTW
C FFT library for real & complex transforms in 1+ dimensions. FHist
File history, comparison and merging tools. FIDOGATE
Fido-Internet gateway and a Fido tosser. FIERA
Create Web Based surveys with FIERA for Linux. FileBackup
Complex ease to use backup solution with Online storage support based on HTML interface. FileBrowser-NG
Easily navigate and see files that are stored on a Web server. Filegarden
Filemanager with editor for text and multimedia files editing and processing. FileZilla
Fast and reliable cross-platform FTP, FTPS and SFTP client. FilterProxy
Filtering (HTML modifying) HTTP proxy with a modular filter system in perl. FinerEdge Amortization Calculator
Global Financial Amortization Calculator.
Fingerstring
Personal database and local search engine.
Firebird
Relational database. FireFox
Firefox web browser. FireFox 3
The browser that has it all. Firefox 5
Firefox web browser. Firefox Quickstarter
A quickstarter for Firefox. FireMail
Sorts the incoming mail and removes spam. Firestarter
Complete firewalling solution for Linux. Firewall Builder
Multi-platform firewall configuration and management tool. Fitrix
Exact Fit Accounting & Business Software For Linux.