This tiny controller cost me less than $2 including postage and it looks like a useful bit of kit where space is at a premium.
They also do some add-on boards for it ("shields").
Code space is about 6k as the 2k bootloader stays - unless you make other arrangements for programming.
This one is a 'Chinese Copy' but seems to work fine.
The 'official' website is linked at the end of the video. I am nothing to do with the company but it just looks like a great little controller!
The Digispark website states that any board at 'rev3' is a 'counterfeit' build - which explains the sub-$2 price (including postage).
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