What are some good 100% free Bug Tracking Software? Also how to catalog Digital Assets?

I’ve been looking at bug tracking software as right now im currently using HacknPlan which is awesome but it has no bug tracking feature, I would like to have some software that tracks bugs, if anyone knows of any 100% completley free bug tracking software I would like to know. I dont want to pay for anything and I have no server so I cant install anything on one, I prefer it to be web based so that other team members can view it easily. Also I have been trying to find a way to catalogue my digital assets. Currently Im using Google Drive to store them in folders and using Google Sheets to track the name, File type, File Extension and what it cost to make that asset, is there an easier way to catalog and track assets? I’ve seen some DAM software out there but its unbelievably expensive.

Thanks in advance

I keep hearing good things about Redmine: http://www.redmine.org/

Bugzilla is another good one: https://www.bugzilla.org/

YouTrack by JetBrains is free for 10 users.

More Info: https://youtrack-support.jetbrains.com/hc/en-us/articles/206545699-How-do-I-switch-to-the-free-10-user-plan-

Mantis is a popular option:
https://www.mantisbt.org/