Based on our record, Phabricator should be more popular than GitHub Hovercard. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
GitHub Hovercard brings you instant access to quick information about the user, repo, issues, commits, and pull requests information from anywhere on GitHub. - Source: dev.to / about 3 years ago
My company has used Phabricator, which is an alternative to Azure Devops, for about 5 years. A few days ago they announced that the project won't be maintained anymore, so we are looking into alternatives. We have around 50 devs+product folks that use Phabricator at the moment. Source: almost 4 years ago
You also mention Gitlab is close to what you would like - maybe Phabricator is even closer: https://phacility.com/phabricator/. Source: about 4 years ago
Https://phacility.com/phabricator/ I think checks most of those boxes, maybe all. Source: about 4 years ago
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BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.