FreePBX is a standardized implementation of Asterisk that includes a web-based configuration interface and other tools.
Asterisk Soap API is an extensible SOAP (Web services) API with the goal to create and support all Asterisk configuration featur
SimplePBX is a configuration/dial plan manager for Asterisk.
ACaMI is a module-based, object oriented framework to administrate Asterisk PBX boxes through a Web browser.
Asterisk::LDAP is a perl module for generating Asterisk 1.0 compatible configuration files from an LDAP directory tree.