The links to free/opensource programs most useful and interesting of September:
AnyToIso Converter for Windows and Mac OS X allows to convert between various CD/DVD images formats
Gmail Notifier a notification for Google Gmail service, useful also if you have many accounts, localized in various languages
GTranslater for Windows 2000/XP/Vista (requires .NET framework 3.5 installed), uses Google API to translate in 89 languages
Fast IP Changer utility to easily change network/IP configurations in 4 different profiles available