Sinclair ZX81 Graphics in 256 x192 pixels and even 320x240 pixels !!

I have been doing some research into hi-res graphics on the ZX81 and was amazed by the amount of software written to use  this - it was not just limited to Rocket Man and Forty-Niner by Software Farm.

I have yet to find any written to use the hardware solutions - but have listed all that I know about at the Sinclair ZX80/ZX81 Forums

Does anyone know of any others