TikZiT is a cross-platform application that allows the creation and modification of TeX diagrams written using the pgf/TikZ macro library. It is especially geared toward rapidly creating "dot"-diagrams for use in academic papers.
- creates and modifies TikZ-based diagrams
- parses TikZ on-the-fly
- support for multiple edges, curved edges, self-loops, and edge nodes
- label vertices
Revision: On an old iMac, the tool pallet failed to show up (unsure as to why). Just installed this on a newer Mac Mini and it works really, really well. Awesome way to do string diagrams!