Minimally maintained

This module provides two functionalities. It helps you to define which menu link should be active when a node (or entity) is not directly linked to a menu link and it makes menu items fieldable (D7 version).

This module integrates the Systempay Credit Card payment service to Ubercart

The Foursquare module helps you in authenticating your users with Foursquare. It wraps the foursquare-async library in order to setup an OAUTH connection for your users.

Flattr is a social micropayment platform that lets you show love for the things you like.
Help support the people you like and enable them to continue with what they do.
Add your own things to Flattr and recieve appreciation from others.

This module integrates the Flattr service into Drupal similar to the WordPress plugin at http://wordpress.org/extend/plugins/flattr/

Drupal 7 status

The Flattr module is largely complete. There are currently no plans for new features to be added.

There are currently no plans for an upgrade path from D6 to D7. Patches are welcome.

Drupal 6 status

The D6 version is looking for a new maintainer, and is currently only on life-support.

Drupal 8 status

The D8 version has a first port but needs testing.

Documentation

Below are links to the readme file for the two available versions.
Drupal 7
Drupal 6

Flattr the maintainers

Did you get help in the issue queue? Do you like the module? Flattr us! :)
Letharion:

Dawehner:

The aim of the project is to create a system, based on services, which will make it possible to transparently use entities from a different site as local entities.