Michael Henke

VoxPelli

Flattr was founded to help people share money, not only content. Before Flattr, the only reasonable way to donate has been to use Paypal or other systems to send money to people. The threshold for this is quite high. People would just ignore sending donations if it wasn’t for a really important cause. Sending just a small sum has always been a pain in the ass. Who would ever even login to a payment system just to donate €0.01? And €10 was just too high for just one blog entry we liked…
Flattr solves this issue. When you’re registered to flattr, you pay a small monthly fee. You set the amount yourself. In the end of the month, that fee is divided between all the things you flattered. You’re always logged in to the account. That means that giving someone some flattr-love is just a button away. And you should! Clicking one more button doesn’t add to your fee. It just divides the fee between more people! Flattr tries to encourage people to share. Not only pieces of content, but also some money to support the people who created them. With love!
Flattr requires an account at flattr.com!

Flattr

This plugin allows you to easily add a Flattr donation buttons to your blog and blog posts.

A standalone plugin for integration with the Flattr service for sharing cake on the internet.
FlattrButton works on its own as a single installed plugin. It currently shares options (for easy migration) with the original Flattr plugin (by flattr.com) and FlattrWidget (by Donncha O Caoimh) such as default Flattr UID, language etc. Separate post option changes also affects these plugins, but this will change.
FlattrButton is dual-licensed Affero GPL v3.0 and GPL v2.0. The source code is available by checkout from the WordPress Plugin SVN repository:
FlattrButton will not work correctly without an account on flattr.com. Having an account there means you can flattr me too.

FlattrButton standalone

FlattrButton standalone lets you implement a Flattr button alongside a post, page or as a sidebar widget.

Flattr vs FlattrButton standalone