Teeny Tokyo - A surprisingly-powerful bulk image resizing app
SlideLizard - Powerpoint plug-in for live audience interaction
Optimage - Advanced image optimization tool
Pingo - Optimize images for the web quickly 🖼️⚡
ImageKit.io - Instant multi-platform image optimization
Imakiku - Imakiku is an audience response system for real-time voting, posting comments, and surveying.