I LOVED XedMada's stencil Neon Necessity and ended up making more bright colors/shapes so figured I'd share! Credit goes to XedMada for the original idea - http://graffletopia.com/stencils/453
Cocoon Data Holdings Limited (CDHL) is the owning company of the brand "Covata". The Covata Icon Family should be used to create diagrams that relate to the Covata solutions.
"This is Service Design Thinking" is a book on service design that offers up a visual language/icon set with a CC license. The only problem is that they only offer AI vector files or flat pdfs. That problem is solved here!
Tango icon library status symbols
Tango icon library emblem symbols
Tango icon library device symbols
Tango icon library category symbols
Tango icon library actions symbols
NTI Enviromux and a collection of sensor icons