YASnippet is a template system for Emacs. It allows you to type an abbreviation and automatically expand it into function templates.

EMMS is the Emacs Multimedia System. It is a small front-end which can control one of the supported external players. Thus, it supports whatever formats are supported by your music player. It also supports tagging and playlist management, all behind a clean and light user interface.

CIDER (Clojure Interactive Development Environment that Rocks) aims to provide an interactive development experience similar to the one you'd get when programming in Emacs Lisp, Common Lisp (with SLIME or Sly), Scheme (with Geiser) and Smalltalk.

CIDER is the successor to the now deprecated combination of using SLIME + swank-clojure for Clojure development.

There are plenty of differences between CIDER and SLIME, but the core ideas are pretty much the same (and SLIME served as the principle inspiration for CIDER).

GNU Emacs is an extensible and highly customizable text editor. It is based on an Emacs Lisp interpreter with extensions for text editing. Emacs has been extended in essentially all areas of computing, giving rise to a vast array of packages supporting, e.g., email, IRC and XMPP messaging, spreadsheets, remote server editing, and much more. Emacs includes extensive documentation on all aspects of the system, from basic editing to writing large Lisp programs. It has full Unicode support for nearly all human languages.

This package provides various handy commands based on the Emacs completion function completing-read, which allows quickly selecting from a list of candidates.

This Emacs package provides font-lock, indentation, navigation and basic refactoring for the Clojure programming language. It is recommended to use clojure-mode with Paredit or Smartparens.

This package provides go-mode, an Emacs mode for working with software written in the Go programming language.

This package implements basic Bluetooth management functionality, such as connecting and disconnecting devices, setting properties and aliases, putting the adapter in discovery mode and controlling its power supply. It also includes a pairing agent.

mastodon.el is an Emacs client for Mastodon, the federated microblogging social network.

Elfeed is an extensible web feed reader for Emacs, supporting both Atom and RSS, with a user interface inspired by notmuch.

This package adds functionality to Emacs Ibuffer for grouping buffers by their Projectile root directory.

Emacs-Syncthing is a client for the Syncthing file synchronization tool which provides an Emacs interface to replace the built-in web UI.

This package provides a series of rules and helper functions to prevent advertisers from tracking you when you open URLs (or listen to podcasts) in Emacs.

Use highlight-symbol to toggle highlighting of the symbol at point throughout the current buffer. Use highlight-symbol-mode to keep the symbol at point highlighted.

The functions highlight-symbol-next, highlight-symbol-prev, highlight-symbol-next-in-defun and highlight-symbol-prev-in-defun allow for cycling through the locations of any symbol at point. Use highlight-symbol-nav-mode to enable key bindings M-p and M-p for navigation. When highlight-symbol-on-navigation-p is set, highlighting is triggered regardless of highlight-symbol-idle-delay.

highlight-symbol-query-replace can be used to replace the symbol.

This package provides an Emacs library to use the Emacsclient as $EDITOR of child processes, making sure they know how to call home. For remote processes a substitute is provided, which communicates with Emacs on stdout instead of using a socket as the Emacsclient does.

This package provides an Emacs interface for performing searches with ripgrep.

Lemon is a tiny system monitor which displays system information in the echo area when Emacs is has been idle for a few seconds. This is a fork of zk_phi’s Symon, which has been largely rewritten. It works nicely with EXWM.

With Magit, you can inspect and modify your Git repositories with Emacs. You can review and commit the changes you have made to the tracked files, for example, and you can browse the history of past changes. There is support for cherry picking, reverting, merging, rebasing, and other common Git operations.

Vertico provides a minimalistic vertical completion UI, which is based on Emacs' default completion system. By reusing the default system, it achieves full compatibility with built-in Emacs commands and completion tables. Vertico is pretty bare-bone and only provides a minimal set of commands. Additional optional enhancements can be provided externally by complementary packages.

SLIME extends Emacs with support for interactive programming in Common Lisp. The features are centered around slime-mode, an Emacs minor mode that complements the standard lisp-mode. While lisp-mode supports editing Lisp source files, slime-mode adds support for interacting with a running Common Lisp process for compilation, debugging, documentation lookup, and so on.

This Emacs package allows you to open a target page on github/gitlab (or bitbucket) by calling browse-at-remote command. It supports dired buffers and opens them in tree mode at destination.

Scratch is an extension to Emacs that enables one to create scratch buffers that are in the same mode as the current buffer. This is notably useful when working on code in some language; you may grab code into a scratch buffer, and, by virtue of this extension, do so using the Emacs formatting rules for that language.

This package provides groovy-mode for syntax highlighting in Groovy source files, REPL integration with run-groovy and Grails project navigation with the grails mode.

Alert is a Growl-workalike for Emacs which uses a common notification interface and multiple, selectable "styles", whose use is fully customizable by the user.