If you are working in a development team and are seeking out sources to help with multiple tasks that make up your large project here is a free project management system that can be a solution to your needs:

This project management system consists of columns. You choose how many columns you need. All you have to do is slide your entries into the "in progress" column and add some notes. When you are done with your task you can slide it back into the "done" column.

This app is web-based so there is nothing to download or install. The basic account seems to be pretty adequate for most users. I think the premium service offers unlimited tasks/projects and you can invite unlimited number of people to collaborate!

https://www.meistertask.com/