Roadio

Still the most impressive admin design for instructors' teaching and administrative control was this product, built by a young British coder and the son of a Ghanian government official who had been an ADI in Luton.

It was free and I met them each in London at my expense, to discuss marketing.  They kindly kept it working a year longer than they were planning to, at my pleading.  But ultimately they were spotted by an international app company and took their talents elsewhere.

Nothing's ever come close for its graphical user interface and delightful use of haptics, in my opinion.