Apps with 'Read Only' feature

SQLPro for MySQL is a powerful MySQL & MariaDB database client which allows quick and simple access to MySQL Servers, including (but not limited to) those hosted in Amazon RDS and Microsoft Azure.

ReddBar is a fast, distraction-free Reddit client that lives in your macOS menu bar, allowing you to browse subreddits without logging in. Designed for users who want a minimal, no-clutter experience, ReddBar provides quick and easy access to the latest posts from your favorite...

Native PostgreSQL clients for macOS and Linux.

Another simple read-only KeePass app.

Claw is a read-only client for the Lobsters link aggregator with support for saving posts, functioning as a reading list.