If you're using more than one cloud storage service (it's hard not to with all the free space being thrown around), managing your files between them can be tricky. Otixo gives you a centralised view of all your online files for easy copying and pasting between accounts from the web interface or through a mapped drive on your desktop.
Otixo currently connects to Dropbox, Google Docs, Box, SkyDrive, SugarSync, Picasa, MobileMe and Amazon S3. You can also add your own FTP or WebDav servers to connect to. Otixo doesn't store your files on its servers or save your login credentials -- in most cases, that is (the SugarSync API seems to work differently than Dropbox, Google and SkyDrive, but you can choose not to have your password saved in the service).
Once you connect your accounts, you've got an Explorer-like or Finder-like view of all your files. You can drag and drop them at will, as well as rename files, download to disk, share and preview the PDFs and images online.
As a centralised manager for online files, Otixo is similar to previously mentioned Primadesk, with a couple of advantages or differences: the support for adding FTP or WebDav servers and access to all your online files as a drive on your Windows or Mac desktop. With the latter, once you add Otixo as a WebDav drive, all your online accounts will appear as folders under the new Otixo drive. Another unique feature, in beta, is Otixo Workspaces, where you can add files from any/multiple services to a workspace and share those folders with others.
The service might be most helpful for getting all your online files organised and accessing them on the go -- you can login from anywhere to this one site to access all your files.
The free plan offers 250MB of bandwidth usage (the amount of network traffic used copying files or moving them around, for example) a month; for unlimited bandwidth usage, upgrade to the $US9.99 plan.