Full Disclosure: I work for the makers of DonorPro (www.donorpro.com)
We offer a donor management system that includes many of the same features as DonorPerfect, Raiser's Edge and some of the other solutions mentioned here.
There is a good comparison, including DonorPro and many of other products mentioned above, here http://tinyurl.com/lb5ve2
Good luck!

I don't know the timeline so I can't say if this is repackaging XP, or vice versa. But Lean Programming has been around for awhile.

There are a lot of similarities to XP. God forbid we have two similar development methodologies. What's next? One operating system;')