S.S.E. File Encryptor is described as 'Securely encrypt your private and confidential files or whole folders' and is an app in the Security & Privacy category. There are more than 25 alternatives to S.S.E. File Encryptor for a variety of platforms, including Windows, Mac, Linux, iPhone and Android. The best alternative is Cryptomator, which is both free and Open Source. Other great apps like S.S.E. File Encryptor are TrueCrypt (Free, Open Source), AES Crypt (Free, Open Source), Encrypto (Free) and Boxcryptor (Freemium).
Encryption Wizard (EW) is a simple, strong, Java file and folder encryptor for protection of sensitive information. EW encrypts all file types for data-in-transit protection and supplements data-at-rest protection.
Safebox encrypts and syncs files with your Cloud folder. Thanks to generated keys, no more remembering passwords and dealing with strength of passwords. Create separate keys for shared folders and start collaborating. Crypto code is opensourced.
DigiVault is a portable, file-based encryption software for Windows. It helps you create and manage encrypted file containers or repositories for storing confidential files. Repository files are not bound to its storage device, making it portable.
nCrypted Cloud is a Privacy, Security, and Collaboration solution that gives users full control over their personal and corporate Dropbox data. nCrypted Cloud adds client side encryption to your Dropbox existing data, and does not require you to migrate or move your files.
S2S is a free iPhone/iPad app that enables you to not only encrypt files and store them in Dropbox, but also to share these encrypted files with your friends without disclosing your encryption password.