If you have a medium-to-large lawn of up to 1,500 square metres, you could do worse than give the YUKA 1500 a whirl. It has the amazing ability to collect grass clippings in its optional grass ...
Tow-behind dethatchers can be pulled ... use a motor to drive the tines through your grass. Lawn sweepers have rotating brushes with a catcher in the back for gathering debris.