CROWD - a Single Sign-on (SSO) application that speaks AD, LDAP, OpenID, etc.

CONFLUENCE - the wiki you're using now

FISHEYE - Web browse your CVS code

CRUCIBLE - Code Review

JIRA - Bug Tracking and Problem Reporting

IDE Support (Eclipse and InteliJ)

BAMBOO - continuous development integration testing

CLOVER - Code Coverage Analysis

ATLASSIAN - general info on all Atlassian applications