A C and C++ Library + a compiler to create Adobe Flash SWF movies up to version 9 (v1.8.1). Supports nearly all the tags, includes an ActionScript compiler. Detailed docs and other tools: convert fonts to Flash, decompile Flash, jpg2swf. LASTEST IS 1.8.4
Ruby On Flash is a compiler written in Java that compiles Ruby sourcecode directly into Flash applications(.swf files), and aims to provide a programmer-friendly approach to casual Flash game development.