Bitcoinbugzilla is a project mainly written in Perl, it's free.
BitCoin Bugzilla Extension
DISCLAIMER: This could eat all of your bugs, bitcoins, trash your wallet, etc, You take full responsibility for this when using this product.
Assigns Every bug a BitCoin Address / Shows Coins Donated for each bug
Bugzilla: 3.6.1 Bitcoin: 3.3 Perl Modules: JSON::RPC::Client (apt-get install libjson-rpc-perl)
BACKUP Your bugzilla database, .bitcoin folder before starting!
Install BitCoin(d) in Server Mode on a machine the bugzilla installation has access to, set a password for it
Place folder in your bugzilla 3.6.1+ extensions dir
Login as Administrator to Bugzilla -> Administration -> BitCoin Extension -> Configure as Required
Validate Communication - http://server/bugzilla/page.cgi?id=bitcoin.html
Run Sanity Check
Profit!