Extensions are installable packages which give CiviCRM new functionality, and this directory provides a centralized list of extensions which the CiviCRM community has created.

Further resources:

This extension allows a staff user to add, edit and delete line items of a contribution.
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Report to show activities assigned to the current user...
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A port of the Drupal 'civicrm_og_sync' module for WordPress that enables two-way synchronisation between BuddyPress Groups and CiviCRM....
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This is an extension for importing from and exporting to OSDI endpoints from CiviCRM.
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Grants access for event creators to view or edit their events' participants.
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This function takes a group of contacts, and splits it into several new smaller groups, each with some maximum number of contacts. The original group is left untouched....
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This extension permits a contact to be changed from one type to another.
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This CiviCRM extension provides an API method that allows you to search for relationships that were active on a given date. I hope that this will be a temporary extension, and that this functionality will one day part of CiviCRM core....
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This is a small utility module I wrote because I needed to batch process a list of email address and mark the with the "on hold" status in CiviCRM. You paste in a list of emails and you can batch edit their "on hold" status. I also included the possibility to remove the "on hold" status....
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Add ability to use USAePay as a payment processor for Credit Cards and ACH/EFT.
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The "Style Guide" extension demonstrates common HTMTL/CSS styling conventions used within CiviCRM. It adds a new submenu, "Support => Developer => Style Guides" with a list of demo pages. For more information, see https://github.com/civicrm/org.civicrm.styleguide....
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