Google's very own "Loch Ness monster," also known as Google Drive, has finally launched. It's the new face of Google Documents, and it's also Google's oft-rumored Dropbox-killer. It enters a scene crowded with competitors besides Dropbox that let you sync multiple folders, collaborate with friends, and stream data to your mobile device — so how does Drive fare?

We'll take a look at the top apps that let you sync files between all of your devices automatically, share files using password protection, pick which folders you want to sync, and do anything else you might want to do with a syncing app. While our evaluations of each app aren't full-on reviews, they are encapsulations of where each app excels and what makes each unique. Refer to the chart at the bottom of the page for full breakdowns of each application.