Let me join your Loving The Donation Tracker bandwagon. Been using donations for my clan for years and although we can't use Paypal, it already proven to be very helpful in automatically doing the calculations of collected funds. Before I bought it, I had to calculate manually, now, with the specific goals (categories) and payment system (I use the offline payment system as a confirmation of money sent to our clan bank account) it pretty much does everything by itself.
Keep up the good work Michael and don't listen to people demanding free mods. I would love them too but, as someone already posted, nothing in life is really free, especially quality products. So if I have to pay 20, 30, 35 or even 40$ for a great mod, so be it!