[HELP] ALM, Task, Architecture and Documentation software

Hello, folks.
I have worked so far with IBM Engineering Workflow Management (ALM and DOORS), JIRA and have recently started using ClickUP. I am looking for a way to make tasks, track them, create documentation for my software (including Architecture) and have everything linked (DOORS-Style).
I need something free which has a lot of memory available to it. I do not need to integrate it with GIT as I will simply paste links to merge-requests (although if your tool has some way to integrate it in git, that would be swell).
Thank you for your help!

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