Woopsi is a Nintendo DS GUI library for rapidly creating user interfaces for homebrew software. Modelled after the AmigaOS windowing system.

Release notes:

Fixes:
– ListBox::setAllowMultipleSelections() works correctly.
– Replaced byte and short iterator variables with ints.
– Compatible with devKitPro v24 and libnds 1.3.1.
– Renamed “DynamicArray” to “WoopsiArray” for compatibility with dkp24.
– Made libnds makefile the default instead of PALib.

http://forum.gbadev.org/viewtopic.php?t=14332&start=45