Flatfile - The new standard for data import
DBeaver - DBeaver - Universal Database Manager and SQL Client.
Backand - Backand is a backend-as-a-service for AngularJS that provides out-of-the-box social login, push notifications, Ionic integration and more.
DataGrip - Tool for SQL and databases
csvbox - Spreadsheet importer for your web app, SaaS or API
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.