PICOL – 500+ Mono-Colored Icons In Vector
PICOL (Pictorial Communication Language) is a project to find a standard + reduced sign system for electronic communication and comes with a set of 500+ icons for that.
Items in the set are mono-colored and has 3 versions: 16*16px PNG, 32*32px PNG and SVG.
There are some badge icons inside the set (like accept, edit, delete) for adding an action message to icons.
Also, a web-based generator helps creating a custom icons in any size with the desired badge.