1. [common] Software that has some important functionality deliberately removed, so as to entice potential users to pay for a working version.
2. [Cambridge] Variety of guiltware that exhorts you to donate to some charity (compare careware, nagware).
3. Hardware deliberately crippled, which can be upgraded to a more expensive model by a trivial change (e.g., cutting a jumper).
An excellent example of crippleware (sense 3) is Intel's 486SX chip, which is a standard 486DX chip with the co-processor diked out (in some early versions it was present but disabled). To upgrade, you buy a complete 486DX chip with working co-processor (its identity thinly veiled by a different pinout) and plug it into the board's expansion socket. It then disables the SX, which becomes a fancy power sink. Don't you love Intel?