Catalyst is a modern, flexible MVC framework for developing websites and web applications. It is a proven technology which powers many high-profile and high-traffic websites.

It is used in many different industries - some sample sites are listed below:

- http://www.bbc.co.uk/iplayer - Streaming TV and Radio
- http://www.vox.com - Popular hosted blogging platform
- http://www.Foxtons.co.uk - London's leading estate agent
- http://www.magazines.com - Magazine subscription service
- http://www.pennysarcade.co.uk - Online retail site
- http://my.opera.com/community - Opera Software community site

MEN Media run several local news sites using Catalyst, showing how a common look & feel can be re-skinned across multiple deployments with a shared back-end.

- http://www.manchestereveningnews.co.uk
- http://www.southmanchesterreporter.co.uk
- http://www.wilmslowexpress.co.uk
- http://www.salfordadvertiser.co.uk
- http://www.tamesideadvertiser.co.uk 
- http://www.rossendalefreepress.co.uk 

As an open-source project, Catalyst is not owned by any single company, but instead follows an open, community-driven development process. Support, development, and consultancy services available from multiple vendors in the UK and overseas. At OpusVL we have a great deal of experience with Catalyst, especially in the areas of eCommerce and ERP integration. Our developers are contributors to the Catalyst open-source project, and regularly give talks about this technology at conferences and user groups.