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 protects the use of a personal from address in the Send E-mail takas (after search). It does not protect the use of personal from address in CiviMail (Mass mailings)....
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This simple extension adds an icon on the Drupal recent items block. Clicking on this icon clears the items.
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Backport of FontAwesome so it can be used in CiviCRM < 4.7. Useful if your extension uses fontawesome icons. http://fontawesome.io https://wiki.civicrm.org/confluence/display/CRMDOC/Icons ...
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Online Worldpay Payment Processor using API to generate tokens and authorise payment. Once installed just set-up the payment processor and this will be available for using in CiviCRM...
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This extension has been developed for the test purpose only....
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Extended membership report with support of filtering/showing custom fields of Individual contact.
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This extension adds a new API to CiviCRM: Entity is FinancialItem, action is Get. You can also use the derived actions getsingle, getvalue, getcount etc....
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Provides functions to look up address meta-data from Postcodes.io: admin district, geolocation, and county.
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A simple email reader, targeted for developers, when they have activated the 'Redirect to Database' option. Useful for debugging.
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Provides extra tools to assist organizations with a lot of families, households, and couples in their CiviCRM database.   Current features include family/spouse information at a glance when viewing a contact record.   For example:  ...
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This CiviCRM extension tries to makes CiviCRM less intimidating for the not so tech savy user.
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This extension allows users to get their CiviCRM assigned activities into their Google Calendar or similar calendaring applications, by providing a feed of each user's assigned activities in iCalendar format, ready to be subscribed to from within Google Calendar, Outlook, etc....
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The DefaultDashlets CiviCRM extension creates a settings page that allows administrators to define the active dashlets for new users based on group membership. Usage Enable the extension and visit /civicrm/admin/defaultdashlets (Administer > Default Dashlets) to set default dashlets by group....
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This extension adds a block to the contact summary that allows editing of any configured relationship type with a UI similar to the employer field.
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Sets opt out flag when people are marked as deceased. On install deceased existing contacts will be opted out. Note that most CiviCRM processes take the is_deceased flag into account so this is likely to be of use only if you have specific data processes that benefit from it...
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