CNL is a PSIM provider based in the UK. They are best known for their CEO being a founder of Axis (Keith Bloodworth [link no longer available]) and their partnership with IBM.
CNL is expanding in the UK with industry veteran and former Integral CEO Matt Kushner joining as Americas President [link no longer available].
Vidsys, Proximex and Orsus are probably better known in the US. I would anticipate CNL increasing their marketing efforts in the US over the next year.