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.
The Maximum Entropy Toolkit provides a set of tools and library for constructing maximum entropy (maxent) models in either Python or C++. It features conditional maximum entropy models, L-BFGS and GIS parameter estimation, Gaussian Prior smoothing, a C++ API, a Python extension module, a command line utility, and good documentation.
Pydiction consists of a Vim plugin and a Python script that allows programmers to tab-complete their Python code in Vim by generating a dictionary file of Python modules, and their attributes and methods. It comes with a default dictionary containing the entire Python standard library, keywords, built-ins, and many 3rd-party modules like Numpy, Django, Flask, Requests, Twisted, PyQT4, Pygame, OpenGL, wxPython, PyGTK, MySQLdb, Psycopg2, and more.
The Darwin Calendar Server is a standards-compliant server that allows multiple users to collaboratively share calendaring information. It provides a shared location on the network to store schedules, and allows users to send each other and manage invitations. In order to provide interoperability with multiple calendaring clients, the server implements the CalDAV protocol, which is an extension of WebDAV, which is in turn an extension of HTTP.