When it comes to viewing files, though, Otixo is a bit of a kludge. You can view .JPG files and .MP4 files with a built-in viewer, and you can view a few other file types, including .PDFs, using the Google document viewer. That's all to the good. But most of my files are Microsoft Office files: .DOC and .DOCX files, with a healthy smattering of .XLS and .XLSX files. When I double-clicked those, I couldn't view them and was only shown a screen with information about the file, including its size and the last time it was modified.
After some digging, I found that if you click the file, then click the "Launch in..." icon at the top of the screen, the file will launch with whatever viewer that particular cloud storage platform uses. For example, if I clicked on a .DOC file that was stored in OneDrive, it launched in the Microsoft Word online app; if I clicked on it in Google Drive, it launched in the Google document viewer; and if I clicked on it in Dropbox, it launched in the Dropbox document viewer.
One of Otixo's selling points is the way it lets you share files with others, using a feature called Spaces. To use it, you create a new Space, drag files to it from any of your cloud services, and then give people access to that Space. Because it's a virtual area, your files aren't physically moved there -- they still remain in their original cloud locations. Each Space also has its own discussion area.
Apps and for-pay versions
Otixo offers separate apps for Windows, macOS, iOS and Android devices. The macOS and Windows apps look and work like the web-based version. The mobile apps have a more stripped-down look, but offer the same features as the other versions.
The free version of Otixo limits your bandwidth to 2GB a month. Various paid versions give you more bandwidth, starting from 99 cents/mo. for 5GB up to $9.90/mo. for 50GB.
The main attraction of Otixo is the way it lets you easily share files from several cloud services using the Spaces feature. Once you get used to its viewing features, they work fine as well. But if you access your cloud files a lot and you handle large files, the limit of 2GB a month for the free service may cause problems for you.
If you frequently use multiple cloud services, have a hard time remembering where your files are, want to manage files from a single location and want to copy and move files across services, you'd do well to use one of these free cloud-service management tools.
Jolicloud and MultCloud both feel like works in progress. As a result, my top choice is Otixo which, despite a somewhat kludgy interface, gets the job done -- and lets you do it either on a desktop or via a mobile app.