Neovim
Neovim is a modal text editor forked from Vim, built to be extensible and embeddable. Modal editing: the keyboard behaves differently depending on mode—normal mode keys are commands (move, delete, change), insert mode keys are literal text. This lets almost every key act as a command without touching the mouse.
Neovim runs entirely in the terminal, needs no display server, and starts instantly on resource-constrained remote nodes. Combined with Tmux, it forms a complete development environment that works identically whether you're on a laptop or SSH'd into a compute cluster.
Neovim's main innovation over Vim: a built-in Lua runtime and stable plugin API (LSP client, Treesitter, async jobs). Configure and extend with Lua instead of Vimscript, making Neovim a real IDE without bloat.
$ nvim file.txt # edit file $ nvim +10 file.txt # edit file, jump to line 10 $ nvim -c "set number" # edit with command $ :q # quit (in Neovim)
Configuration at ~/.config/nvim/init.lua (modern) or init.vim (legacy Vimscript). Start with minimal config, extend as needed. Plugins transform Neovim into a full IDE: language servers for autocomplete, Treesitter for syntax, fuzzy finders, linters, formatters.