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   * [Krucible](https://usekrucible.com) — Krucible is a platform for creating Kubernetes clusters for testing and development. Free tier accounts come with 25 cluster-hours per month.
   * [ZARVIS](https://zarvis.ai) - Free managed Kubernetes namespace for open source Github project. Free 1GB memory and 1 vCPU.
   * [mendix.com](https://www.mendix.com/) — Rapid Application Development for Enterprises, unlimited number of free sandbox environments supporting 10 users, 100 MB of files and 100 MB database storage each
+  * [m3o.com](https://m3o.com) - A cloud platform for API services development. M3O is a fully managed Micro as a Service offering focusing on Go microservices development in the Cloud. Free tier provides enough to run 5 services and collaborate with others.
   * [Okteto Cloud](https://okteto.com) - Managed Kubernetes service designed for remote development. Free developer accounts come with 8GB of RAM, 4 CPUs and 5GB Disk space. The apps sleep after 24 hours of inactivity.
   * [outsystems.com](https://www.outsystems.com/) — Enterprise web development PaaS for on-premise or cloud, free "personal environment" offering allows for unlimited code and up to 1 GB database
   * [pipedream.com](https://pipedream.com) - An integration platform built for developers. Develop any workflow, based on any trigger. Workflows are code, which you can run [for free](https://docs.pipedream.com/pricing/). No server or cloud resources to manage.