TikZiT is a graphical tool for rapidly creating an editing node-and-edge style graphs. Design node-and-edge style graphs with this tool. It was originally created to aid in the typesetting of "dot" diagrams of interacting quantum observables, but can be used as a general graph editing program.

TikZiT is a cross-platform application that allows the creation and modification of TeX diagrams written using the pgf/TikZ macro library.

TikZiT Features:
1. creates and modifies TikZ-based diagrams
2. parses TikZ on-the-fly
3. support for multiple edges, curved edges, self-loops, and edge nodes
4. label vertices

The license of this software is Free, you can free download and free use this graphing software.