The Noun Project’s mission is to share, celebrate, and enhance the world’s visual language. The goal is to collect and organize all the symbols that form our language into one easy-to-use online library that can be accessed by anyone. All the symbols on their site are completely free to download, and can be used for design projects, architecture presentations, art pieces – just about anything. The folks behind The Noun Project think a visual language that can be understood by all cultures and people is a pretty amazing thing. I fully agree.
(thank you Edward)