VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
ObserveIT - ObserveIT insider threat detection & user behavior analytics enables companies to mitigate the risk of insider threats.
Easy File Locker - Easy File Locker is a pretty small file at 224KB and will do exactly what it says.
DeviceLock DLP - DeviceLock provides DLP solutions protecting organizations from data leak threats.
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.
Armor - Armor offers cloud security through integrated managed cloud or managed security as a service for public cloud or private cloud.