CMPDL

The C.MP.DL. (Curse ModPack DownLoader), is a Java written tool created by Vazkii to overcome the new modpack download system implemented on Curse, to provide a way for people who can't or doesn't want to use the official Twitch Launcher (which lacks features such as Offline Gameplay and linux support).

Features
In a nutshell, it allows
 * Direct download of all the modpack files and configs through a simple GUI.
 * Create a folder that can be directly placed into the instances folder MultiMC.
 * Select the version of the modpack that the user wants to play.
 * Display the required forge version for the correct behavior of the downloaded modpack.

It lacks the features of update for the modpack, or a better integrations with the links on curse. (Actually you need to provide the "project" webpage link instead of the "modpack" webpage link).

Instructions to download a modpack

 * 1) Select the modpack you want to use by accessing it's project page, this is important, the URL must have "project" on it, followed by an unique ID for the modpack, not the "modpacks" URL.
 * 2) Copy the URL, and paste it on CMPDL.
 * 3) Wait for the magic modpack download to finish.
 * 4) At the end of the modpack download, CMPDL will state a Forge version required to use the modpack, take note of it.
 * 5) Copy the folder that was created for the modpack, in this case I was using Invasion by Darksoto, so I'll copy the folder named "Invasion v1.0.7". To the "instances" folder on MultiMC.
 * 6) Once copied, on the MultiMC main screen you should have a new instance named alike, edit the instance.
 * 7) There, you must select the "Install forge" and select the version that was stated before.

Project Mainpage (on GitHub)
https://github.com/Vazkii/CMPDL/