The safelock is a very simple one tool encryptions/decryption files which works with drag & drop. It is based on python and uses PyCrypto to encrypt imported files with AES encryption.
It then creates the base file data sqlite with a unique key to store the encrypted files and folders in binary blobs necessary for some later decryption.
Specifications
AES encryption
Encryption and decryption
Sqlite database
GUI
Simplicity
drag & drop