This modpack includes all mods that I found to be useful or interesting - I browsed through all existing mods with at least several thousand downloads to pick them. It includes 135 mods, tailored for free singleplayer or multiplayer play.

Includes quests. Might add more in the future.

For additional challenge, some recipes are disabled. You'll have to trade with villagers to get certain items.

Overpowered items and recipes are also disabled.

List of disabled item recipes:

iron armor
diamond armor
banners
stone axe, shovel, sword, hoe
iron shovel
diamond hoe
shield
item frame
campfire
fishing rod
crossbow
lantern
compass
clock
painting
jetpack
jet boots upgrade

Of technology mods it has Industrial Foregoing, Create, Integrated Dynamics, Pneumaticcraft, Applied Energistics 2.

Includes useful mods for multiplayer: Easier Sleeping, Lootr, Spark, FTB Teams, FTB Chunks.

Several life quality mods: Useful Backpacks, Sophisticated Backpacks, EII, Jump Over Fence, Inventory Sorter, Inventory Totem, Jade, Clean View, Right Click Harvest, Stack Refill, Stackable Potions, Dank Storage, Notes, Force Config Screens, Useful Spyglass, Trading Post.

Minimap mod - Journeymap.

Various dungeons and structures for exploration are provided by Awesome Dungeon, Dungeon Crawl, Philip's Ruins, Towns and Towers, Yung's Better mods.

2 dimension mods: Twilight Forest and Undergarden.

Also includes Custom Block Outline which makes block outline easier to see.

Mods are carefully configured to provide balanced experience.

I recommend 8 GB of RAM for this.

A server with this modpack is available. If you want to join, ask in the discord.

Ad finitum