Here's something that will complement Merme's list of Ergonomic tools.

http://www.lifewithease.com/garden.html

With pictures.

For example:

Garden Knee Cushion
Deluxe Garden Rocker Seat
OXO Good Grips
Expanding Rake
Garden Kneeler/Seat
ERGO Floral Prunner
Fist Grip Long Rach
Garden Scoot
and more...

Life With Ease
P.O. Box 302
Newbury NH 03255

1-800-966-5119
Don and Sheila Swatz