Here is a brief intro:

82,000 nominations were made for thousands of individual startups. The top startups in each of twenty categories have made it to the final vote. Starting now, you can vote for the startups you think are most worthy in each of twenty categories – from “best technology achievement” to “best overall startup.”

From: The Crunchies: Finalists Are Up, Vote For the Winners

For more info check here, or go vote!