I'm the owner of HTLoto (http://www.htloto.org), a free betting system for all Hattrick maches.
HTLoto was launched on 1st June 2010 and is compatible with OAuth login system.
HTLoto has a twitter account, follow it to get news about HTLoto and Hattrick: @htloto
I'm the creator of PHT (http://pht.htloto.org), a free CHPP framework in PHP.
PHT helps developers to create CHPP website linked to Hattrick. All CHPP datas are available though a full OOP interface that makes things very easy.