This is an experimental port of tinycc.
You can run C source code on NaCl, which means, you can run C programs on your browser without interaction with servers. Note that the development is not completed at all and you may see weird errors even for simple programs.
You can find the source code and documents from my github repository
To try this, you might need Chrome 14 or later and enable native client (visit chrome://flags/ or set --enable-nacl). I tested this with Chrome 15.0.874.5 dev on 64bit linux and 14.0.835.186 on 32bit mac. It seems 32bit nacl tcc crashes on my 64bit linux. So, this may not work on 32bit linux either.