SQLObject is an object-relational mapper, i.e., a library that will wrap your database tables in Python classes and your rows in Python instances. It currently supports MySQL through the 'MySQLdb' package, PostgreSQL through the 'psycopg' package, SQLite, Firebird, MaxDB (SAP DB), MS SQL, and Sybase. It should support Python versions back to 2.4.
Python-SOAP is an implementation of the SOAP protocol in the Python programming language. SOAP is the foundation of the so-called Web services, allowing the interaction of software across the network. The goals of the project are standards-compliance, a clean design, and well-written documentation. This implementation is built on top of the DOM, which makes it robust and easily extensible.
CalCore is an advanced, flexible calendaring component for Python. It allows the Python developer to write advanced calendaring applications either using their own event storage or integrating with external calendar servers. It features support for private calendars, shared calendars, resource booking, integration with iCalendar clients (Apple iCal, Mozilla Sunbird, KOrganizer) using the iCalendar protocol, invitation workflow, meeting support, including helper functions to look for free time, and recurring event support. It is being used as the core of Nuxeo's CalZope and CPSSharedCalendar products.