What do do with HP DL380 G4 and DELL PE2850

I have 2 servers that sit and do nothing right now while my other servers host game and website servers any ideas on what to do with these? they have dual x eons 8gb of ram and 146 gb drives (will be upgraded) also they run server 2012! Thanks for the suggestions! Also I'm just a high school student that screws around with this stuff for fun that's why I'm looking for uses!