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Free software
Spacemacs
Spacemacs with recent files and editing windows open
Spacemacs consists mainly of configuration files, pre-defined internal commands, and configurations for various plug-ins (called 'packages'). It features a novel mnemonic key binding design (e.g., commands for file manipulation often start with "f",) which attempts to improve ergonomics (and avoid emacs pinky), a system for adding or excluding pre-configured features called 'layers', and includes verbose software documentation. It has three user-selectable input modes: Emacs mode, Vim mode (based on the evil Emacs package for Vim emulation), and Hybrid mode.
As of 2021, its repository on GitHub has been starred over 21,100 times and has over 11,300 commits.