Origins lets players chose an origin at the start of the game that gives them special 'powers'. This link will take you to the base mod, but I have added over a hundred more origins.
For those who may be wondering, I will list a few more of the mods here.
Framed Blocks
Alex's Mobs and Caves
Chipped
Comforts
Xaero's world/mini map
Corpse
Jade
Jei
Lootr
Macaw's bridges, doors, ETC
Pehku
Rechiseled
Storage Drawers
Villager Names/Guard Villagers
Better Villages
Curios API
Fast Leaf Decay
Freecam
A lot of FTB stuff
Immersive Paintings
Inventory Sorter
Mouse Tweaks
Natures Compass
Sound Physics Remstered
Twilight Forest
There are a LOT more mods then this, but these are the ones that will affect gameplay the most, or that people tend to use the most.
PLEASE NOTE:
You may find some worlds already installed, that is from testing the modpack, and forgetting too uninstall them. They are not there on purpose. will remove them shortly.
If you would like me to list all the mods, with links, let me know in the comments.
feel free too suggest any moods you think I should add!