solgraph
Visualize Solidity control flow for smart contract security analysis
...A nice example of piping contract source that is in your clipboard through solgraph, dot, and preview: (Use whatever image previewer is available on your system; Preview.app is available on Mac) You have to have graphviz installed (brew install graphviz) to render the DOT file as an image. Depending on your permissions, you may need to add the unsafe-perm flag.