Laravel Passport provides OAuth2 server support to Laravel
A lightweight and powerful iOS framework for intercepting HTTP/HTTPS
Extensible security first OAuth 2.0 and OpenID Connect SDK for Go
Easy to use cryptographic framework for data protection
A high-level OpenPGP library
Anti-Spam SMTP Proxy Server implements multiple spam filters
Wapiti is a web-application vulnerability scanner
PHP strong authentication library, web interface & CLI, OATH certified
API for Password Manager Daemon (pwmd)
Strong Email & Apache Log Analysis with Active Security Features
antigift is simple cross-platform, files & folders encryption tool
Full-featured C2 framework which silently persists on webserver
Java SSH API
Open Source PKI solutions
An open workshop for secure application