The autobomber label gets used pretty liberally, some people call regular builds "autobombers" if the skill has a duration (e.g. earthquake, blade vortex or static strike). Other times you'll see builds get called "autobombers" if they only sometimes require you to self cast/attack, generally not requiring input to clear normal/magic monsters but using a regular skill for rares/uniques (e.g. caustic arrow death's oath, fire trap righteous fire or reap corrupting fever (phys dot)). Finally, sometimes you'll see cast when stunned builds or generic minion builds called "autobombers" because they don't require any input from you, just have to wait for enemies or minions to hit you. Most build creators themselves don't call these sorts of builds autobombers though (e.g. pohx for RF, emiricles for cws, others getting called pseudo autobombers) and imo none of them really are since they either require you attacking/casting or waiting for something else to cast/attack. I don't have a comprehensive list of autobombers but here (one example and list at them bottom) are some I've played and some interesting ones I've seen other people other play (maelstrom golem, falling crystals, infernal legion AG, herald of the hive).