List of free docker stuff for developerππ½
If you're looking for all programming tools around docker (not just free). Check this page List of docker Programming Tools
Easypanel
Modern Server Control Panel - Manage your server without fighting the terminal. Server control panel based on Docker.
Tag: docker, paas, control-panel, server
Developer Edition Free Forever Single User Unlimited Projects Unlimited Services Community Support

Container Registry
A no frills Harbor based Container Registry Service for teams, individuals and Software Vendor looking for ways to distribute images instead of ZIP files..
Tag: container, container-registry, docker, storage
1 GB free storage for unlimited private container images
WhaleDeck
The all-in-one docker manager for iPhone, iPad, and Mac. The powerful GUI gives full control over docker without typing a single command.
Tag: docker-manager, docker, devops
Up to two servers