I've been working on a couple of Joomla projects since the start of the year. Between March and April I think I've been working on about 3. Now the latest project had a feature where visitors could donate to the organization and no ordinary Joomla PayPal module would work.
The visitor must have the option to select from a range of options, how much the want to donate, or submit the amount they can afford. So I had to write a module just for that - JoomPal.
With JoomPal you can set various donation values, success url - once payment is complete, add custom button, choose currency (dollar sign changes according currency selection), style the form using css and more.
Enjoy JoomPal!
Download: JoomPal v1.0