Pynfo is a combination IRC info, search, and network relay bot. It supports basic fact definition (with persistence between runs) and searching of Google and Dict.org. In the network relay mode it "bridges" channels on different networks by passing messages between them. It also has a plugin interface, allowing users to easily define new commands.
Pyndex is a simple and fast full-text indexer implemented in Python. Pyndex also includes an easy to use Bayesian classifier. It uses Metakit as its storage back-end. It works well for quickly adding a search feature to an application, and is also well suited to in-memory indexing and searching. It can handle phrase queries. It performs best in applications involving a few thousand documents, but its scaling is mostly limited by available memory.
PyBackend is a Python module which provides object persistence through a relational database backend. You need not write SQL queries within your Python class to store or retrieve object-attributes. If your data model allows you to view attributes of your objects as columns of tables in an RDBMS, then PyBackend is for you. It allows the developer to map individual classes to corresponding databases. Hence, an application using PyBackend can use multiple databases to populate its objects; all transparently to the developer. It frees the application programmer even from the task of creating and managing database connections.
py-xmlrpc is an extremely fast implementation of the xmlrpc spec for Python (written in C). It supports both blocking and non-blocking clients and servers on Windows and POSIX platforms. Version 0.8.1 is 100% compliant with the xmlrpc validator found at http://validator.xmlrpc.com.