InfluxDB the open-source time series database provides a rate limited free tier on their cloud offering. It is especially useful for operations monitoring and IoT sensor data applications.

Nvidia GeForce Now is a game streaming service that offers a 60 minutes per session free tier. The difference with other game streaming services is that you can only stream their library of games if you already own them in Steam or Epic and take advantage of Nvidia’s high end GPUs that could offer ultra settings for new games even on an old Dual core PC provided your internet connection

Oracle provides a free tier to their cloud offering.