Seafile

Seafiles is a sharing tool that's quite similar to Dropbox. With it, you can share files with other users and sync files easily.

With Seafiles, you can create your own library of files and sync their content on several different computers at once, so you can access updated versions no matter where you are.

The first time you use it, you'll get one gigabyte of free storage, though you can buy more capacity. You can also increase security by encrypting the uploaded files.

It is, in short, the perfect tool to manage, share, and sync your files on other computers to access them when you need them most. Think of it as an online pendrive.