Elastix is an appliance software that integrates the best tools available for Asterisk-based PBXs into a single, easy-to-use interface. It also adds its own set of utilities and allows for the creation of third party modules to make it the best software package available for open source telephony.
The goals of Elastix are reliability, modularity and ease-of-use. These characteristics added to the strong reporting capabilities make it the best choice for implementing an Asterisk-based PBX.
 
Elastix is a Finalists: Best Project for the Enterprise, of the 2008 SourceForge.net Community Choice Awards
 
Elastix feature list:
 
The features provided by Elastix are many and varied. Elastix integrates many software packages, each including their own set of great features. However, Elastix adds new interfaces for control and reporting of its own, to make it a complete package. Some of the features provided natively by Elastix are:

• VIDEO support. You can use videophones with Elastix!
• Virtualization support. You can run multiple Elastix virtual machines on the same box.
• Really friendly Web user interface
• "Fax to email" for incoming faxes. Also, you can send any digital document to a fax number through a virtual printer.
• Billing interface
• Module for automatic outgoing campaigns
• Graphical configuration of network parameters
• Resource usage reporting
• Remote restart/shutdown options
• Incoming/outgoing calls and channel usage reports
• Integrated voicemail module
• Voicemail Web interface
• Integrated operator panel module
• Extra SugarCRM and Calling Card modules included
• Download section with commonly used accesories
• Embedded help interface
• Instant messaging server (Openfire) integrated
• Multi-lingual support. Languages supported include:
  • English
  • Spanish
  • Rusian
  • Korean
  • Greek
  • Chinese
  • Polish
  • German
  • Frensh
  • Romanian
  • Slovenian
  • Portuguese
  • Danish
  • Italian
• Mail server integrated including multi-domain support
• Web based email interface