Particle Electron - Cellular IoT development board with a simple data plan
DBeaver - DBeaver - Universal Database Manager and SQL Client.
Stampd - A document blockchain stamping service
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
Headspin - Test your mobile app on different global cell networks
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.