List of free CI-CD stuff for developerππ½
If you're looking for all programming tools around CI-CD (not just free). Check this page List of CI-CD Programming Tools

Aviator
Avoid broken builds, long code-reviews, cumbersome merge processes and flaky tests. Put your mundane, frustrating workflows on autopilot.
Tag: CI-CD, code-review
Up to 15 users Merge queue: FIFO and Parallel modes Skip-the-queue for hot fixes Batching support ChangeSets: monorepo and polyrepo PR-groups Stacked PRs: cross-PR dependency management Stacked PRs: incremental code review Early Access: Flaky test management

Earthly
Fast, consistent builds with an instantly familiar syntax β like Dockerfile and Makefile had a baby. Write builds once, and run them anywhere β on your laptop, remote, and in any CI. Great for monorepos and polyrepos. Open source, 9000+ stars.
Tag: ci-cd, deployment
6,000 minutes/month Log Sharing Secrets XS and S satellites 8 days cache retention x86 & arm64 satellites Community support
Github Action
GitHub Actions makes it easy to automate all your software workflows, now with world-class CI-CD. Build, test, and deploy your code right from GitHub
Tag: CI-CD, serverless, cron
Free 2,000 minutes per month

Gitlab CI
Outstanding source code exists. For teams and projects big and small, the proof is in the pipeline.
Tag: CI-CD
400 CI/CD minutes per month

Circle CI
Get the best continuous integration and delivery for any platform, in our cloud or on your own infrastructure
Tag: CI-CD
2,500 free credits/week Run 1 job at a time Build on Linux, Windows, and Arm
pulumi
Pulumi's open source infrastructure as code SDK and enterprise SaaS products together provide editions for teams of all sizes.
Tag: cloud, deployment, Infrastructure, CI-CD
1 member Any cloud and language State & secret management Unlimited deployments CI/CD Integrations

Open Source

Buddy Works
Get the most powerful and easy-to-configure continuous integration and delivery platform.
Tag: CI-CD, deployment
Unlimited Delivery Pipelines High-performance Build Environment Easy configuration via GUI & YAML First-class Docker support Continuous Deployment for GitHub, GitLab, Bitbucket, and more Details: 5 projects 120 pipeline runs/mo 512 MB Cache storage 1 GB RAM & 2 vCPU 1 Concurrent pipeline 1 Parallel action

Jenkins
an open source automation server which enables developers around the world to reliably build, test, and deploy their software
Tag: CI-CD, deployment
Free forever and Open Source

Bitbucket Pipeline
Bitbucket Pipelines brings continuous integration and delivery to Bitbucket Cloud, empowering teams to build, test, and deploy their code within Bitbucket
Tag: CI-CD
Free 50 min / month included