Birne is a CD burning program and acts as a frontend for cdrecord and mkisofs. It is written in Python around the pygtkmvc framework and has a nice Gtk+ interface. Major design goal is simplicity and clarity.
Easyfreedb is a cross-platform C++ library for accessing data on a freedb server. It supports protocol level 6 (UTF-8) and uses Boost's LL parser framework for parsing. Easyfreedb has a C-wrapper to make it easy to use from other programming languages.