emacs-validate-html installs the command validate-html, which sends the current buffer to the World Wide Web Consortium’s HTML Validator service and displays the results in a buffer in Compilation mode.

elisp-def finds Emacs Lisp symbol definitions intelligently. It understands namespaces, macros, libraries and local bindings.

The plz-event-source library provides a plz-media-type, a parser, and an event source implementation for the SSE protocol.

This package provides completions for Org-mode source blocks using completion at point function.

This is a thin wrapper around erc that enables one to use the ZNC IRC bouncer with ERC.

This package permits scrolling at increasing speeds based on drag distance.

Treemacs is a file and project explorer similar to NeoTree or Vim's NerdTree, but largely inspired by the Project Explorer in Eclipse. It shows the file system outlines of your projects in a simple tree layout allowing quick navigation and exploration, while also possessing basic file management utilities.

Call gif-screencast to start a recording. A screenshot is taken for every user action. Call gif-screencast-stop (<f9> by default) to finish recording and create the GIF result.

This package gives an overview of the current regex search candidates. The search regex can be split into groups with a space. Each group is highlighted with a different face.

It can double as a quick `regex-builder', although only single lines will be matched.

This program was inspired by the behavior of the ``mouse documentation window'' on many Lisp Machine systems; as you type a function's symbol name as part of a sexp, it will print the argument list for that function. Behavior is not identical; for example, you need not actually type the function name, you need only move point around in a sexp that calls it. Also, if point is over a documented variable, it will print the one-line documentation for that variable instead, to remind you of that variable's meaning.

This package provides an helm extension for emacs-slack Slack client.

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

This Emacs package provides a minor mode which shows git information inside the Dired buffer.

Repeat multi-command "edits" with configurable behavior, supporting multiple modal editing systems.

es-mode includes highlighting, completion and indentation support for Elasticsearch queries. Also supported are es-mode blocks in org-mode, for which the results of queries can be processed through jq, or in the case of aggregations, can be rendered in to a table. In addition, there is an es-command-center mode, which displays information about Elasticsearch clusters.

Emacs Gnuplot is an Emacs major mode for interacting with Gnuplot.

Lightweight yet very flexible startup screen for Emacs.

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).

Fontaine lets the user specify presets of font configurations and set them on demand on graphical Emacs frames.

This package provides a set of Emacs themes that conform with a minimalist aesthetic: they use few colours and appear monochromatic in many contexts

This package provides notification functions for Org Agenda.

This simple Emacs minor mode allows you to toggle a window's "dedicated" flag. When a window is "dedicated", Emacs will not select files into that window. This can be quite handy since many commands will use another window to show results (compilation mode, starting info, and so on). A dedicated window won't be used for such a purpose. For details, please read the source file.

This package allows using Ace jump to a candidate in Helm window.

Indent Bars highlights indentation with configurable vertical graphical bars, using stipples. The color and appearance (weight, pattern, position within the character, zigzag, etc.) are all configurable. Indent Bars works in any mode using fixed tab or space-based indentation. In the terminal (or on request) it uses vertical bar characters instead of stipple patterns. Optional Treesitter support is also available.