qdGraph is a small tool that can generate graphs (graph theory graphs) from "hand-drawn" input and export it into TikZ-Code for the use in LaTeX.
Using the program (or at least the idea behind it) is quite simple: You draw your graphs by hand -- drawing a rectangle represents a node and connecting two rectangles represents an edge between the corresponding nodes.
The functionality very limited up to now. Maybe I add some features from time to time.
The program is not yet published in any way. But I want to do so soon.