IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Anima App - Design, get feedback, convert to code, publish, iterate.
JDraw - Open Source SF.net
Timeline for Sketch - Create beautiful timeline animations in Sketch
IconsExtract - Extract icons and cursors stored in EXE, DLL, OCX, CPL files
Invision - Prototyping and collaboration for design teams