PGP Tool is described as 'PGPTool allows you to encrypt and decrypt files. It's free and easy to use' and is an app in the Development category. There are more than 10 alternatives to PGP Tool for a variety of platforms, including Windows, Mac, OpenPGP, Android and iPhone. The best alternative is GnuPG, which is both free and Open Source. Other great apps like PGP Tool are GPG4Win (Free, Open Source), Encrypto (Free), Axcrypt (Freemium) and p=p (Free, Open Source).
GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. GnuPG, also known as GPG, is a command line tool with features for easy integration with other applications.
Gpg4win enables users to securely transport emails and files with the help of encryption and digital signatures. Encryption protects the contents against an unwanted party reading it. Digital signatures make sure that it was not modified and comes from a specific sender.
Encrypto lets you encrypt files before sending them to friends or coworkers. Just drop a file into Encrypto, set a password, and then send it however you normally would — but this time with added security. It’s free for both Mac and Windows.
It offers an automatic and easy to use solution with end-to-end protection for all written digital communications over the Internet. It have been designed to provide extremely easy and automatic encryption by default for e-mail.
Challenger is a software for the encoding of files, folders and drives. For the installation and for the execution simple user rights suffice. Thereby the program is mobil usable on an USB flash drive too.