
Description: TheLetterEncrypter is a free, open-source encryption software that allows users to encrypt text messages using a simple letter substitution cipher. It provides a basic level of security for short messages.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Crypto Notepad is a free open-source text editor that allows users to encrypt notes and save them locally or in the cloud. It offers strong encryption using AES-256, password protection and secure cloud sync across devices.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API