Opticks is an expandable remote sensing and imagery analysis software platform that is free and open source.If you’ve used commercial tools like: ERDAS IMAGINE, RemoteView, ENVI, or SOCET GXP, we recommend you give Opticks a try. Unlike other competing tools, you can add capability to Opticks by creating an extension, and Opticks provides the most advanced extension capability of any other remote sensing tool on the market.