Active Admin
The administration framework for business critical Ruby on Rails applications.
20 Alternatives To Active Admin
Apache Tika
Apache Tika toolkit detects and extracts metadata and text from different file types.
DBeaver
DBeaver - Universal Database Manager and SQL Client.
HeidiSQL
HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
MongoDB Compass
The easiest way to explore and manipulate your MongoDB data
MySQL Workbench
MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
Sequel Pro
MySQL database management for Mac OS X
code-prettify
Code Prettify is an embeddable script that makes source-code snippets in HTML prettier.
phpMyAdmin
phpMyAdmin is a tool written in PHP intended to handle the administration of MySQL over the Web.