DBeaver - DBeaver - Universal Database Manager and SQL Client.
XCodeClub.com - Rent your own private Virtual Mac with latest XCode.
DataGrip - Tool for SQL and databases
VirtualMacOSX.com - vmOSX -- is your affordable, Mac-based home on the web.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
MacinCloud - MacinCloud is a Mac cloud platform that provides on-demand Mac cloud servers, flexible dev workload infrastructure and comprehensive Mac in the Cloud solutions