DBeaver - DBeaver - Universal Database Manager and SQL Client.
Stylizer - A productivity-focused real-time CSS editor for serious web developers. Mac OS X and Windows.
DataGrip - Tool for SQL and databases
Rapid CSS Editor - Rapid CSS editor is quick, powerful and easy to use HTML and CSS code editor for web developers. Intuitive interface and intelligent features help you become more productive and create modern HTML5 and CSS3 based websites faster and easier.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
Topstyle - TopStyle contains powerful tools for building standards-compliant web sites.