C

coopsymbiotic

Provides membership new and renewal statistics based on CiviCRM historical data (so you can also generate membership reports for previous years).

CiviCRM personal campaign teams allows people to create their own personal campaign page (PCP) which is part of a team, with a common objective as well as an individual page for each member.

CiviCRM extension to lookup the region of a contact depending on their postcode (or other field).

Adds an option to force recurring donations on contribution pages.

Makes it possible to create CiviCRM activities using a profile.

Saves a copy of message templates on disk every time they are saved. Helps for doing diffs between versions.

Helps throttle CiviCRM forms against abuse/spam.