Awesome First PR Opportunities 
A list of awesome beginners-friendly projects.
Inspired by First Timers Only blog post and YourFirstPR project.
If you are an open source project maintainer, add the label first-timers-only (or similar) to your project and list it here so people can find it
If you are looking to contribute then explore this list, look at first-timers-only labelled open issues on Github, and follow @first_tmrs_only on Twitter to be notified when a new first-timers-only issue is created.
If you are not a programmer, but would like to contribute, check out the Awesome for non-programmers list.