The Dirkon is a paper pinhole camera. The pattern and instructions were published in a Czech magazine in 1979. I have made two and each has its own unique characteristics – light leaks, pinhole size and shape, etc.  I am extremely fond of this camera and probably use it the more than other cameras.

The Videre is a DIY camera from the UK. It comes as  sheets of lasercut recycled cardboard and takes about an hour to put together.  It was originally funded through a Kickstarter campaign and doesn't appear to be available any longer. It's big so I haven't used it as much yet. It has a colossal vignette that I'm debating about fixing. I'll probably leave it.