Quilt, an AIR App for Creating Sprite Sheets
Quilt is a simple AIR app that allows you to import animation frames, assemble them on the time line, preview them and the automatically stitch them together into a sprite sheet for export into your game.
This is a project I started after dealing with the fact that there are very few good tools for creating 2D game assets. At the moment this is more of a proof of concept than an actual useful app so bookmark this page and come back in a few weeks.
In the meantime you can download the source here.