This extension provides a grab-bag of functionalities that aren't quite core-worthy, but are useful enough to share.
Including:
1. A collection of tokens related to a contact's "most active" recurring contribution.
2. A pair of payment processors to track offline recurring contributions.
3. An extended version of the core recurring contributions report.
4. A nice javascript recurring/one-time switcher.
5. A collection of advanced configuration, site-wide and/or per-page (modified defaults, force recurring, etc.)
And more!