Amazon Cloud Storage - front end software options?

[11thHour]

I signed up for Amazon's Cloud Storage unlimited plan for $5/first year on black friday. However Amazon's front end is fairly remedial and requires manual management of storage files. Currently I am trialing Goodsync, and at $39, and it's remarkably capable of backing up and syncing most online cloud accounts together, and includes encryption options as well. What other front end file management options are there for ACS? Any good free ones?