Localization
Very extensible CMS platform based on PHP and used by many NGOs - "Community Plumbing"
Firefox is the popular open source web browser from Mozilla
Free/cheap Internet telephony and handy IM tool.
Web based photo sharing service
Apple's desktop operating system.
Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.
Gmail is a web-based email with very user-friendly interface and huge storage capacity
Parallels for Intel-Macs that give you the flexibility of running Windows on a Mac OS X simultaneously