Nocturnal has just released Catapult v1.41.4, the latest version of their Game Boy Advance(tm) development system / middleware. The latest version includes new GBA compression support (custom RLE, ADPCM, etc..), support for a user-defined sound cache, improved GBA display compatibility and much more.
In all, there are more than 100 improvements over the previous release.
A freeware version can be downloaded from Nocturnal's website, and includes several games with complete source, the latest Catapult Standard Library (CSL v1.6), a complete 400+ page users guide, and more. http://www.nocturnal-central.com/
Also..
The website for Nocturnal's first commercial GBA title 'Pocket Arcade Classics' has been updated. The game is now 85% complete, and Nocturnal has started actively looking for a publisher for the game. http://www.pocketarcadeclassics.com/