Flexible open-source content management and blogging software with an active user and developer community and a wide variety of plug-ins or extensions available.
Full-featured open source office productivity suite, featuring word processor, spreadsheet, presentation, drawing and database packages; free MS Office replacement.
Picasa is software that helps you instantly find, edit and share all the pictures on your PC. Picasa also makes advanced editing simple, and makes it easy to share your pictures; you can email, print photos home, make gift CDs, and even post pictures.
Social networking for non-social purposes with a focus on professional development, networking for jobs and problem solving through the expertise of those in your extended network.
Eclipse is an open source community whose projects are focused on providing an extensible development platform and application frameworks for building software.