This package allows fringe bitmaps to be defined with a visual string representation.

This program sends HTML email using Org-mode HTML export. This approximates a WYSiWYG HTML mail editor from within Emacs, and can be useful for sending tables, fontified source code, and inline images in email.

This package provides a minor mode to show all lines that have a comment with a tag, for example listing them right next to each other.

Anzu provides a minor mode which displays "current match/total matches" in the mode line in various search modes. This is an Emacs port of Anzu.zim.

Selectrum is a solution for incremental narrowing in Emacs, replacing Helm, Ivy, and IDO. Its design philosophy is based on choosing the right abstractions and prioritizing consistency and predictability over special-cased improvements for particular cases. As such, Selectrum follows existing Emacs conventions where they exist and are reasonable, and it declines to implement features which have marginal benefit compared to the additional complexity of a new interface.

Flymake collects diagnostic information for multiple sources, called backends, and visually annotates the relevant portions in the buffer.

This package provides Emacs major modes for editing various Git configuration files, such as .gitattributes, .gitignore, and .git/config.

Font Lock Studio is an interactive debugger for Emacs syntax highlighting rules, also called Font Lock keywords. It can single-step Font Lock keywords -- matchers, highlights, and anchored rules, to see what happens when a buffer is fontified. Breakpoints can be set on or inside rules. When inside a rule, matches are visualized using a palette of background colors. The explainer can describe a rule in plain-text English. Finally, tight integration with Edebug allows stepping into Lisp expressions that are part of the Font Lock keywords.

The Pythonic Emacs package provides function for convenient running Python on different platforms on local and remote hosts including Docker containers and Vagrant virtual machines. To use Pythonic with Docker you need to install Docker Tramp Emacs package.

This Emacs package is an extension to ert. It aims at writing test cases in a simplified form.

This project makes it easier to generate preprocessor macros from Emacs for C++ code that uses OpenVDB and needs to be build against multiple incompatible versions of it.

This library enables additional font locking in Dired mode. This is adapted from the extra font lock rules provided by Drew Adams' Dired+ package.

This package provides transparent Age file encryption and decryption in Emacs for Pass-Age, a port of Pass, the standard Unix password manager.

Emacs Polyglot, or Eglot, is an Emacs Language Server Protocol client that stays out of the way. It guesses the LSP program to start for the current file, using the major mode as a hint. It prompts you to enter one if it fails.

Wucuo provides a spell checker on top of either Aspell or Hunspell, and relies on Flyspell internally. It operates on the current region or buffer, a file, or a complete directory.

This package allows controlling Pulseaudio from Emacs.

doct provides an alternative, declarative syntax for defining Org capture templates.

Emacs SQLite is a simple SQLite interface for connecting and retrieving information using the SQLite program through Elisp programming. It is not intended as a user interface.

This library gives you the tools to split up the inputs and run the function in many sub-processes (one per CPU core), then merges their outputs and passes it back to the current Emacs. In the meantime, current Emacs does not hang at all.

Instant GitHub-flavored Markdown/Org preview using grip, mdopen or go-grip.

This package provides on-the-fly syntax checking for GNU Emacs. It is a replacement for the older Flymake extension which is part of GNU Emacs, with many improvements and additional features.

Flycheck provides fully-automatic, fail-safe, on-the-fly background syntax checking for over 30 programming and markup languages with more than 70 different tools. It highlights errors and warnings inline in the buffer, and provides an optional IDE-like error list.

This package permits comparisons of two or three buffers based on diff output.

This package provides a simple alternative to notmuch-address. In particular, it gives up on persistent caching, external scripts, and backward compatibility.

FB2 Reader provides a major mode for reading FictionBook2 (.fb2 and .fb2.zip files) ebooks.