Donate to Download - Premium WP Plugin

Donate to Download is a plugin that allows to distribute files through donations. People can decide how much to donate and what payment gateway to use for that (PayPal, Payza/Alertpay, Skrill/Moneybookers, Authorize.Net, InterKassa, EgoPay, Liberty Reserve, Bitcoins (via Paysius)), but you always can set minimum limit of their donations or even set fixed amount for each file separately.