S42Transfer!

Syncthing replaces proprietary sync and cloud services with something open, trustworthy and decentralized. Your data is your data alone and you deserve to choose where it is stored, if it is shared with some third party and how it's transmitted over the Internet.

Seafile is a file hosting software system. Files are stored on a central server and can by synchronized with personal computers and mobile devices via the Seafile client. Files can also be accessed via the server's web interface. Seafile's functionality is similar to other popular services such as Dropbox and Google Drive, with the primary difference being that Seafile is free and open-source, enabling users to host their own Seafile servers without artificially imposed limits on storage space or client connections. »

SugarSync lets you synchronize, backup and remotely access files and folders across your PC or Mac. You can also remotely view files from Windows Mobile, Blackberry, iPhone, Symbian and Android.

CloudApp is a dead-simple way to share files, screenshots, almost anything, quickly and seamlessly. CloudApp allows you to share images, links, music, videos and files. Here is how it works: choose a file, drag it to the menubar and let us take care of the rest. We provide you with a short link automatically copied to your clipboard that you can use to share your upload with co-workers and friends.

SparkleShare is a Free Open Source syncing tool. Its light, secure and easy to use. SparkleShare allows you to setup your own servers so you always keep control on your data.

Tresorit is a security solution for distributed storage systems, and with it a group of users can share secure content without trusting any administrator or third party provider. This system guarantees the users that they can: share content with a group; handle read and write permissions; manage dynamically changing groups; and no one outside the group can read or write files. These properties can be reached with implicitly granted security, based on a strong cryptographic technology.

Sync lets you store your files safely, securely and easily in the cloud. Access and share your files from your computers, iPhone, iPad and the web - all without compromising your privacy.

Distributed, encrypted, and blazing fast object storage, where only you have access to your data.Blockchain-based, end-to-end encrypted, distributed object storage, where only you have access to your data.

Pulse, officially-sanctioned fork of Syncthing , is a free, secure, and distributed file synchronisation engine.Synchronise your files without also sharing them with a stranger in the cloud.