Sit-to-stand lift. When I could no longer get up out of low seats (shower chair and toilet, especially), we got a lift that helps me transfer between seats - where the sling just goes behind my back and under my arms, so can be put on and taken off while I'm seated. Patient must have some arm and leg strength. Insurance covered this: http://www.invacare.com/cgi-bin/imhqprd/inv_catalog/prod_cat_detail.jsp?prodID=GHS350
Overhead lift - portable. Alternative to Hoyer, but can only be used in a fixed location. We use one to transfer between bed and wheelchair, or between bed and commode. Portable (sort of). Got ours from local "Hearts for ALS" loan closet:
Overhead lift - ceiling mounted. More flexible and functional than the portable overhead lift. But considerably more expensive, and requires installation.