M-x start-hacking

A calendar framework for Emacs

Live web development in Emacs

Emacs document annotator, using Org-mode

org-babel integration with Jupyter for evaluation of (Python by default) code blocks

An Emacs package for running demonstrations, screencasts and presentations from within Emacs.

Structured, Context-Driven, LISP Editing and Refactoring

Quick-peek inline-window library for Emacs

Ob-tmux is an Emacs library that allows org mode to evaluate code blocks in a tmux session.

An instant latex previewer for Emacs, based on xwidget and child-frame

query calibre from emacs, useful for referencing work

simple surround manipulation. save you 10 minutes of googling "is there surround.vim for emacs that doesn't use evil/vimpulse?"