seaLISP is a Lisp interpreter with as many bells and whistles as possible but with absolutely no dependencies apart from the C++ standard library. The garbage collector, the computer algebra library, and all other components are written from scratch to be portable. It also has a PSP port with some primitives for graphics.
uterus is a codec library for financial tick data with an emphasis on market data integrity and maintainability. It comes with a set of tools to convert (mux) and print (demux) data from some sources, and to perform standard tasks like selecting instruments, creating snapshots and candles from tick data, etc. Special care is taken to provide longevity and consistence. All timestamps are internally converted to coordinated time, and price and quantity quotes are converted to a monetary datatype which doesn't suffer from rounding errors. Most importantly, meta data is stored along with the payload data in an inseparable unit, to provide self-contained and self-documenting files or network streams.
planes is a hierarchical surface framework for PyGame. It introduces a "Plane" class which extends PyGame's "Surface" functionality, offering a hierarchy of mouse-sensitive, draggable Surfaces that can be used as sprites, windows, icons, or other interactive elements. In addition, the planes.gui module uses planes to provide basic GUI elements like container, label, text box, option list, and button.
pycms is a minimalist component-based Web Content Management System based on CherryPy. It has most of the goodies of Plone/Zope: Python instead of a PHP security mess, no MySQL can of worms, clean separation of code and content, and the ability to run nicely behind a Web server/cache/load balancer. In addition, it features plain text storage of all site contents and settings in JSON files, effortless theming, and a small memory footprint.
zlog is a reliable, efficient, thread safe, flexible, pure C logging library. It was written because there were no good C logging libraries along the lines of Logback for Java or log4cxx for C++. printf can work, but can not be easily redirected or reformatted, and syslog is slow and designed for system use. It provides a syslog model, log format customization, multiple output, safe run-time reconfiguration, high performance, user-defined log levels, safe log rotation, a log4j-style key-value map, in-built debugging, and no external dependencies.