GitHub Repository Size might be a bit more popular than SideCI V.2. We know about 1 link to it since March 2021 and only 1 link to SideCI V.2. 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.
Sider — Code review platform for many languages. Supports integration with GitHub. Free for public repositories with unlimited users. - Source: dev.to / almost 3 years ago
There's also a chrome extension. Haven't used it though, so can't verify it. Source: about 2 years ago
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
DeepSource - Automated code reviews with static analysis.
Githunt - Explore the top projects on GitHub 🏆
GitHub + Slack Integration - Full visibility into your GitHub projects right inside Slack
Github++ - Adding bookmarks to github