IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Anima App - Design, get feedback, convert to code, publish, iterate.
Icon Slate - Icon Slate lets you easily compose, import and export desktop icons in many formats.
Timeline for Sketch - Create beautiful timeline animations in Sketch
Icono Maker - Icono Maker is an icon maker for Windows.
Invision - Prototyping and collaboration for design teams