PHP Projects To Join

Hey guys, I have noticed that nobody talks about PHP projects one could join. I have created this thread so that we can share or recommend projects one can join. These should be only PHP projects you are part of and enjoyed. So I will go first.

Building a Business Directory web-app in PHP (https://www.liveedu.tv/brodie124/RG6xq-building-a-business-directory-web-app-in-php/) is my most recent project. The other PHP project I'm part of is "How to Create Hotel Booking web app in PHP". These are my suggestions and recommendations. What are yours? Please share your suggestions and I will join if I find the project interesting.
Have a nice day.