libprolooks is a custom widget library for Gtk+ designed for audio applications.
It includes the custom widgets from the Calf plugin project.
As there has been no release yet, the source code can be accessed here:
If you want to clone the repository, use:
git clone git://repo.or.cz/libprolooks.git
07. Mar. 2009: first release: libprolooks-0.0.0.tar.bz2
04. 05. 2009: Release 1.0.0: Sources / Ubuntu packages
03. 07. 2009: Release 1.1.0: Release tarball
25. 01. 2010: Release 1.2.0: Release tarball
If you have any issues using libprolooks, report them here.