SpiderOak - SpiderOak makes it possible for you to privately store, sync, share & access your data from everywhere.
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
FileVault - FileVault is a method of using encryption with volumes on Mac computers.
CrashPlan - CrashPlan for Small Business backup software offers the best way to back up and store business & enterprise data securely - offsite, onsite & online in the Cloud.
VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.