Icon Generator - Icon Generator is a little application built on AIR that lets you generate a CS5 or Web 2.
Sketch Extensions - An official collection of Sketch extensions & plugins
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Base UI Sketch Framework - Huge set of everything you need to design and prototype
Icono Maker - Icono Maker is an icon maker for Windows.
SketchTool - Export pages & slices out of .sketch docs using CLI