Bravos - Modern replacement for Google Finance
Baïkal - Cal and CardDAV server
Scout Finance - Free finance app that's like having a Bloomberg in your pocket. Download:
Radicale - The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
Quantale - Realtime stock market data on your fingertips
SOGo - SOGo is groupware server with a focus on scalability and open standards.