Open Source

Wiki

1. Confluence is only $10 for up to 10 users, but is Java based.
2. Twiki (perl based) is free.
3. Wikidot is PHP+Postgres db (free)

MySql

1. MySql workbench for DB design
2. phpMyAdmin

Project Management

http://www.cyberciti.biz/tips/open-source-project-management-software.html

Mac

http://www.opensourcemac.org/