Playscii - Full-featured ASCII art and graphic editor and game creation tool
ASCII Prints - ASCII art on your wall ¯\_(ツ)_/¯
draw.io - Online diagramming application
Asky - ASCII art as a service ᕙ(⇀‸↼‶)ᕗ
UMLGraph - UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.
Fotomoji - Turn your photos (and selfies) into an emoji explosion 😂