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Cryptomator provides transparent, client-side encryption for your cloud. Protect your documents from unauthorized access. Cryptomator is free and open source software, so you can rest assured there are no backdoors.

odrive is a free application that makes it easy to manage, access, and share all of your files from one place. Integration into more than 20 services, full bi-directional desktop sync, placeholder files, a robust web client, and advanced sharing capabilities.

Boxcryptor is an easy-to-use encryption software optimized for the cloud. It allows the secure use of cloud storage services without sacrificing comfort. Boxcryptor supports all major cloud storage providers (such as Dropbox, Google Drive, Microsoft OneDrive, SugarSync) and supports all the clouds that use the WebDAV standard (such as Cubby, Strato HiDrive, and ownCloud). With Boxcryptor your files go protected to your cloud provider and you can enjoy peace of mind knowing that your information cannot fall into the wrong hands. »

CryptSync is a small utility that synchronizes two folders while encrypting the contents in one folder. That means one of the two folders has all files unencrypted (the files you work with) and the other folder has all the files encrypted.

This is an experimental project of porting encfs to the Windows world.

Sookasa transparently protects files across the Dropbox cloud and linked mobile devices, while preserving the native Dropbox user experience on Windows, Mac, iOS and Android.

The software Cloudevo aggregates any number of cloud storage to a big united cloud. It is unessential from which provider you have your cloud storage. Cloudevo combines all of the different cloud services to one large cloud. This united Cloud is then mounted as a drive on your device. All files are encrypted securely on the Cloud drive. In addition to encryption, the software includes useful functions, which facilitate the handling, administration, and synchronization of the data in the Cloud. You can access your files in Cloud Drive from anywhere. »