MPUtils (Mod Pack Utilities) gives modpack developers handy tools, starting with a tabbed changelog menu players can open from the main menu and the in-game menu. It runs on Forge for Minecraft 1.7.10 - 1.12.2.
You also get customizable quick commands (numpad . key), commands that show the block ID you are looking at or item IDs you hold, an in-game EditMode for configs and a text editor used by the MPBasic and MPTipAlert addons.
Packing your own modpack? Install MPUtils from the panel in one click and test the whole pack on your Minecraft server.