The primary goal of this project is to define a portable and efficient C programming interface (API) to determine the call-chain of a program. The API additionally provides the means to manipulate the preserved (callee-saved) state of each call-frame and to resume execution at any point in the call-chain (non-local goto). The API supports both local (same-process) and remote (across-process) operation. As such, the API is useful in a number of applications.

Swift is a free instant messaging client. It concentrates on making the most-used features easily accessible, supporting internationalisation, private and group chats, together with features for security-conscious organisations including Security Labelling.

Varnish Cache is a state of the art web accelerator written with performance and flexibility in mind.

Thatcher Ulrich's first outline font design. He started with the goal of producing a neutral, readable sans-serif text font. There are lots of "expressive" fonts out there, but he wanted to start with something very plain and clean, something he might want to actually use.

PostgreSQL is a powerful, open source object-relational database system. It is fully ACID compliant, has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages). It includes most SQL:2008 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP. It also supports storage of binary large objects, including pictures, sounds, or video. It has native programming interfaces for C/C++, Java, .Net, Perl, Python, Ruby, Tcl, ODBC, among others, and exceptional documentation.

Six is a Python 2 and 3 compatibility library. It provides utility functions for smoothing over the differences between the Python versions with the goal of writing Python code that is compatible on both Python versions.