Formspec Editor
Just_Visiting

A Realtime in-game formspec viewer/editor

Awards
rubenwardy

Adds achievements

Equipment Examiner
AntumDeluge

A node that will examine the specs of equipment.

Documentation System
Wuzzy

A simple in-game documentation system which enables mods to add help entries based on templates.

Encyclopedia
Wuzzy

Adds an encyclopedia item which allows you to access the help.

Item Help
Wuzzy

Adds automatically generated help texts for items.

Basic help
Wuzzy

Adds some help texts explaining how to use Minetest.

Ore Info
TwigGlenn4

Show ore depth and rarity.

Personal Bookmarks
AntumDeluge

Allows players to create a limited number of personal bookmarks to where they can teleport.

newplayer
cheapie

Yet another show-people-the-rules thing

Pencil Redo
Emojiminetest

Adds a pencil and a text edit table, to edit infotext

Lookup Tool
Wuzzy

Adds a tool which shows help entries about almost anything which it punches.

Snippets
luk3yx

A way for admins to run and save lua snippets.

FS51
luk3yx

Compatibility layer for formspecs

Moth
cool_beans

Adds moths which can send messages (from Lord of the Rings)

Signs Redux
sorcerykid

Signs Redux is a complete rewrite of default signs that adds many new features