Doc Center's DocLanding focuses on documents. You create repositories called points that you can then open up to other users at varying levels of control. For example, you could give clients the ability to review and comment on documents (for which you can black out material you don't want to share). But you can go further than that and let different points overlap, so different teams can collaborate on a set of documents "owned" by one point. Todd Fishback, Doc Center's president, says this allows cross-team and even cross-organizational collaboration when useful while retaining control over permissions and versioning.

DocLanding offers some the security and ease-of-use that big business buy in enterprise solutions, but it is built for small businesses and entrepreneurs. DocLanding offers a free account with up to 256 MB, then it is only $9 for the first GB of storage. So, don't take my word for it, go to www.doclanding.com and try it for yourself.