My company Beyond Code is mainly developing software for web application developers but we also build custom high-performance eCommerce applications for our clients.
Email debugging, testing, and sharing with a desktop app for macOS, Windows, and Linux that listens for outgoing emails of your local applications and catches them. You can read the docs and get it on the official HELO website.
Tinkerwell is a desktop application for PHP developers that allows quick prototyping and direct application access on local and remote applications via a REPL interface. Check out its awesome features at the Tinkerwell website.