For my highschool Computer Science project, I built an encryption engine and password manager in C/C++. I wrote a pseudo-encryption algorithm with string manipulation, rotation, and encoding.
Keeep is a lightweight password management and encryption utility for Windows. It stores all usernames, passwords, credit cards, free-form notes, and more, in a securely encrypted file, protected by a single master password. Keeep is written in C++ in Code::Blocks.