Savane can be used for this:
https://gna.org/projects/savane
and so is ViewCVS for web-based version of CVS:
http://sourceforge.net/projects/viewcvs
This may be a good way for people sending bug-reports, patches, etc. for bots with source code available
edit: well, forgot to change the option to make it a public poll... so post your opinion instead (so that it will be "public"), please
