Google Drive

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IPFS

iCloud is a cloud storage service provided by Apple, the service is provided freemium to all owners of Apple devices like iPone, iPad and Mac's. With iCloud users can store and acces their photos, videos, documents, notes, contacts, and more.

Store your files in the cloud with Dropbox and use them across all your devices or share them with friends. Dropbox is a cloud backup services that can be used to store your files online in a secure fashion. With Dropbox you receive 2GB of free storage space when your register, you also get 500MB extra storage for every friend you refer. If you want more you have to opt for a paid subscription.

A cloud synchronization service for sharing files across computers and other devices. SugarSync allows you to backup, access, sync, and share files across variety of operating systems, such as Android, iOS, Mac OS X, and Windows devices. SugarSync also support Linux through third-party clients.

The Invisible Internet Project or I2P for short is a fully encrypted private network layer that has been developed with privacy and security by design in order to provide protection for your activity, location and your identity. I2P ships with a router that connects you to the network and applications for sharing, communicating and building a fully encrypted private network layer.

Pydio is an open-source and self-hosted file-sharing and synchronisation software that you can run on your own server. Pydio fits right into your data management policy, as it provides audit and reporting tools. With Pydio you can empower your organization by letting them control and manage content on the server while at the same time complying with the company security rules.

Librevault allows you to transfer data directly from one device to another, securely. Librevault is a free and open-source peer-to-peer file synchronization software, designed with convenience. privacy and security in mind. The software encrypts all data with AES-256 and uses TLS for all transmissions. Their goal is to make a better alternative to BitTorrent Sync and Syncthing.