Extensions Directory
Extensions are installable packages which give CiviCRM new functionality, and this directory provides a centralized list of extensions which the CiviCRM community has created. This listing displays CiviCRM extensions that work on all Content Management Systems (CMS).
The newest extensions · Create an extension · Add an extension to this directory
This extension adds address verification to anyform. Once a user starts to type in a street address they will be presented with 10 standardized address options from smartystreets. This list will filter the more they type. Once they select an address it will check if the address is verified. In order to use this you need an account at smartystreets.com which is free for non-profits.