I have two, done to scratch personal itches:
xs, a remote shell, written from the ground up using Go with post-quantum key exchanges, simple tunnel support and anti-traffic analysis 'chaff' experiments - think 'an ssh replacement from a parallel universe'. Big thing is, it leverages Go's excellent crypto and network support to achieve most daily ssh use cases, in <5% of the SLOCC so its design and function can be more easily understood by mere mortals, IMHO :)
bacillμs, a near zero-dependency build/CI server - demo instance here