VS Code Extensions
Git Lens
GitLens is an open-source extension for Visual Studio Code
GitLens simply helps you better understand code. Quickly glimpse into whom, why, and when a line or code block was changed. Jump back through history to gain further insights as to how and why the code evolved. Effortlessly explore the history and evolution of a codebase.
Here are just some of the features that GitLens provides,
Markdown Preview Enhanced

Markdown Preview Enhanced is an extension that provides you with many useful functionalities such as automatic scroll sync, math typesetting, mermaid, PlantUML, pandoc, PDF export, code chunk, presentation writer, etc. A lot of its ideas are inspired by Markdown Preview Plus and RStudio Markdown.
To check out the documentation, visit here