Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
Salesforce Platform - Salesforce Platform is a comprehensive PaaS solution that paves the way for the developers to test, build, and mitigate the issues in the cloud application before the final deployment.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
DataGrip - Tool for SQL and databases