The mods used are either open source or have a liscense/policy that allows the distribution of them in modpacks.
ArmorStatusHUD by bspkrs - http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1282347-bspkrs-mods-armorstatushud-directionhud
StatusEffectHUD by bspkrs - http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1282347-bspkrs-mods-armorstatushud-directionhud
AetherII by Gilded Games - http://www.aetherii.com
Biomes O' Plenty by Glitchfiend - http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1286162-biomes-o-plenty-over-50-new-biomes-with-new-trees
EasyCrafting by Lepko - http://mods.lepko.net/download
Enhanced Portals 3 by Alz454 - http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1292751-enhancedportals-3
FastCraft by Player - http://forum.industrial-craft.net/index.php?page=Thread&threadID=10820
Gliby's Voice Chat Mod - http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1291487-glibys-voice-chat-mod-voice-chat-in-minecraft
Hexxit Gear Revisited by Kloud - https://mods.io/mods/1128-hexxit-gear-revisited
Metallurgy by JeanGlassmaker - http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1278061-metallurgy-putting-the-mine-back-in-minecraft
Minions by AtomicStryker - http://atomicstryker.net/minions.php
Ruins by AtomicStryker - http://atomicstryker.net/ruins.php
Secret Rooms Mod by AbrarSyed http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1276042-v4-7-1-beta-secretroomsmod-malsis-doors-compat
The Camping Mod by rikmuld - http://rikmuld.com/camping
The Twilight Forest by Benimatic - http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1276258-the-twilight-forest-v2-3-5-wrecking-block
YAFM by AiryBreath - http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1292539-yafm-yet-another-food-mod-june-17-2016