Create mod (the best mod) and a lot of QOL and fun!
This is mod is based around being able to build nice things, integrate the automation of create, and increase the fun of exploration.
Some of the mods included:
Create mod
Farmer's Delight
Sophisticated Back packs
More Concrete
Awesome Dungeons - all 3 dimensions
Automatic Tool Swap
Enchantment Descriptions
Free Cam
Inventory Essentials
And more a long the same lines.
Primarily designed for my SMP, but is a light weight pack that all can enjoy.