miniLock makes encrypting files and sharing them with friends easy. It's a modern standard for file encryption.
Hammerspoon is a desktop automation tool for OS X. It bridges various system level APIs into a Lua scripting engine, allowing you to have powerful effects on your system by writing Lua scripts.
testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.
Good bootable USB stick creator for windows systems