Best Open Source Software for Mac OS X

Here is my list of the best free and open source software for Mac OS X.

Web Browsing
ChromeA very simple, yet powerful and secure browser created by Google.
FirefoxA highly popular, fast, free web browser.
The UnarchiverUncompress tar, zip, rar and everything else.
Video Playback:
MPlayerCan play almost all video formats.
Word Processing/ Office Suites:
LibreOfficeFull featured office suite with word, excel and powerpoint. Comparable to Microsoft Office.
CyberDuckA very good, free FTP program.
GimpBest free image manipulation program for Mac OS X
InscapeVector graphic editor
Wifi Scanning:
KisMacEasily scan all wireless access points near you.
 HTML Editor:
NvuHTML wysiwyg editor, comparable to Dreamweaver.
AudacitySimple, good audio recording tool
CD Burning:
BurnEasily make CD and DVD videos playable in any DVD players.
TrueCryptVery good disk encryption software.
VirtualBoxMy favorite virtualization program, comparable to VMware.
Personal Finance:
GnuCashGood financial manager application.