Internet Free Icon Set
Neat freebie from IconShock, includes 50 unique Internet of Things icons, every item included comes in full vector formats (Ai, SVG) with a flat design style. It also contains PNG files with transparent background for each one of them in 3 sizes, 128px, 256px, and 512px. Their modern and colorful designs make them perfect for web, print, infographic, or UI projects.