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:

Authentication plugin for Joomla with access control and ACL group assignment features.
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This is just a cache that retrieves ID's of your custom CiviCRM entities, like e.g. groups and custom fields. All info can be found on the github page: https://github.com/Chirojeugd-Vlaanderen/idcache...
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Enables Kint library for CiviCRM debugging
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Allows points to be allocated to contacts....
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Cron Plus adds new features to the Schedule Jobs. It can be set the exactly date / time when a job must be executed
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This is an extension for creating an "Intro to Donate Form" where the user enters a little information specifically the following fields:...
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This extension allows to find and export payment(s) for contribution(s).
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CiviCRM Extension to support you with creating and maintaining households. It is currently under development, so feel free to contact us for the bits that are still missing - or simply contribute the implementations. The extension allows you to choose on of three household modes:...
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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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CiviCRM Admin Utilities modifies CiviCRM's behaviour and appearance in single site and multisite installs....
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Part of the Sunlight Congressional Districts module.  Provides a way to automatically get congressional district information about your contacts into CiviCRM using the Sunlight Congress API....
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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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Many organizations using CiviCRM wish to measure the CHURN rate of their members. CHURN is closely related to the concept of average customer life time. For example, an annual churn rate of 25 percent implies an average customer life of four years. An annual churn rate of 33 percent implies an average customer life of three years. ...
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The extension installs a line item report for the participant, membership, and contribution entities. The report will allow you to select standard columns for these entities, along with custom fields and any price set field that is applicable for the entity. Filters are also also available for each of the price set fields....
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