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:

Creates a "confirm email address" field for profiles to ensure users enter the same email address twice, thus reducing typos.
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Provides conditional on-page behaviors based on user selection for profile fields, price fields, and more. Show/hide, set field values, etc.
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This extension allows to find and export payment(s) for contribution(s).
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Includes a number of custom searches that help give an overview of financial information.  Useful for financial and bookkeeping staff of an organization.   Custom searches include:   Engagement Summary Contact Financial Summary Contact Financial Exclusion Summary ...
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(en) Add support the Paysafe "Card Payments API" online payment solutions for CiviCRM. Also supports the online payment service Monetico by Desjardins. (fr) Permet d'utiliser les solutions de paiement en ligne Paysafe avec CivICRM. Supporte également les solutions de paiement par carte Monetico de Desjardins.
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This is a simple extension that collapses both the communication preferences and demographics sections by default on the summary page.
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This extension causes the "county" field on addresses to automatically be populated when an address is created or updated....
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The CiviCRM WordPress Profile Sync plugin keeps the "First Name", "Last Name", "Email Address" and "Website" fields of a WordPress (and BuddyPress) user profile in sync with the corresponding fields of a CiviCRM contact. The synchronisation takes place regardless of whether the changes are made in WordPress, BuddyPress or CiviCRM....
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Move a contribution from one contact to another. This can be done through the contact's contribution tab or through search results.
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Get your work done in fewer clicks! Speed up your most tedious CiviCRM workflows by adding custom action links to your search results.
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This extension allow to restrict sending emails using "Site From Email Address" to allowed user/roles. The permission that enables this functionality is 'site from email address'. Important This extension overrides the following core 4.6.8/4.6.11 CiviCRM files:...
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Send email notification to event speakers when a new individual registers....
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Restrict online registration to certain events to members only but still have other events open to the public.
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Overview This CiviCRM extension provides some event related report templates. See the README file for detailed information....
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http://drupal.org/sandbox/leez/1929728 A drupal module for querying a CiviCRM database for donor patterns (overview, new, lapsed, upgraded, downgraded, maintained) and producing CSV files from the results....
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