Paos is a server for Python objects and event notifications, and comes with a client module for network communication and object cache management. Paos is often used in workflow systems and similar applications.
ipymssql provides Python support for Microsoft SQL Server. It uses the .NET Framework Data Provider for SQL Server in IronPython. It adheres to the Python DB API 2.0 interface, and supports callproc().
exchange4linux is a production/stable server solution to store/exchange workgroup data on Linux in a style simular to Exchange. Main goal is to provide Outlook users a free and openserver alternative on Linux. Please check also www.exchange4linux.org