ONR = Optimum No Rinse ( A US company called optimum makes this product and is best selling in its category)
Rinseless wash = Washing without a water hose free flow. Just one bucket of rinseless wash solution (e.g. 1oz ONR mixed in 2 gallon water). Internationally, most of the times you aren't allowed to use free flow water to wash cars hence this method is more used.
ONR as QD = ONR can be diluted at several ratios (for rinseless washing, clay lube, QD etc)
Garry Dean = A detailer in US that devised a method for rinseless washing car with minimalistic possibility of scratching. Rather than using one mitt, use several towels dunked in teh solution and after using it on a panel put it aside. That way no dirt gets into wash bucket. Detailed youtube video available.