What is this?
I'll tell you what it's not. It's not a fork of The 1.7.10 Pack with extra mods added and a slew of changes for stability and compatibility. Definitely not that.
What's in it?
Given that we didn't fork The 1.7.10 Pack, you definitely cannot expect to find all of the mods from that pack here.
(The 1.7.10 Pack is, in any regard, an amazing pack and you should take a look at it and donate.)
Since we didn't fork anything, we probably didn't add the following mods to the pack either:
Ars Magica 2
More Planets Galacticraft Add-On
Advanced Genetics
Armourer's Workshop
Artifice
DecoCraft 2
EnderIO Addons
ExtraTiC
FoodPlus
Fossils and Archaeology Revival
Metallurgy
Metallurgy Chisel Pack
Random Things (Blood Moons are fun!)
Secret Rooms Mod
WarpDrive
New additions since 1.095.3
Mine & Blade: Battlegear 2
Aether II
Baublicious
BiblioWoods [Forestry]
CustomNPCs
CustomThings
Draconic Evolution
FTB Utilities
Grimoire of Gaia 3
Immersive Engineering
Infernal Mobs
Minecraft Comes Alive
MineTweaker (CraftTweaker)
MineTweaker RecipeMaker
Iguana's Tinker Tweaks
ProjectE
ThaumicHorizons
WorldEdit
Zetta Industries