tools

Image editing

1. Online image editing tool - http://www.pixlr.com/

Web development/debugging

1. Firebug - javascript/html/css debugging
2. Web Developer - javascript/html/css/forms debugging

Project Management - OpenProj
Bug lifecycle - Bugzilla
Test management - Testopia - can plugin to bugzilla
Google sites for managing project specific data management as well as for organisational specific data.
Google email and chat for project communication.

Security

1. SQL Inject me
2. XSS me