Icons that can be used for navigation. They are simple so use less data and will reduce the time it takes the website to load. They help users to navigate around websites easily by using easily recognisable symbols.
Here are some simple icon designs. I like how easy clean they are and each one has a specific opening to it that allows the icon to be a part of the background. I also like how they are all see through and tie in well the background also.:
Web Design Freebies — Infinity - Free Space Icons
Villa Urbana Projecto Pictogramas Pictogram project
Interesting way of doing app icons. Since we're going colorful this is possible for BP Anonymous.