You could try this one from here home made and you can just keep adding and adding to it, You can even custom design your own add ons either make PCB or just hard wire it. this is simple and easy to make and one baord you can use all trype of PIC'S
http://sergiols.blogspot.com/2009/10...rainer-20.html

You could look at the easypic 6, I did consider it but the more I thought about it I would never use half the stuff on there, So I designed and made my own custom boards from link above to suit my needs