Fab's Bits & Bobs is a mod with a collection of features that I feel would improve the game without feeling too out of place. It's not a tech mod, nor is it a magic mod.
Features
Building Wands: Allows for placement of blocks in a larger area. Comes in different tiers.
Whoosh Wand: Basically a large amount of firework rockets on a stick but with a whoosh.
Block Yoinker: Let's you yoink a block out of the world and place it down somewhere else.
Light: A small redstone light that gives of a large amount of light without drawing too much attention.
Powered Light: Same as the light but always powered.
Lava Sponge: Clear lava with ease using the lava sponge, works like the regular sponge but for lava.
Ore Miner Enchantment: It's a limited vein miner. It only works for blocks tagged as ores. It drops all the loot at the block you mined.
Feline Aura Potion: Cut the claw from a cat and brew it up into a potion. Repels phantoms and creepers while the effect is active.
Pusher Plate: Pushes anything that lands on it in the direction it's facing.
Spider Climbing Limitation: Using blocktags we can now prevent spiders from climbing certain blocks. By default spiders now can't climb on any ice block or glazed terracotta.
Cauldron Conversion Crafting: Convert powdered concrete into concrete by dropping it in a cauldron, or cool off the used lava sponge.
XP Holder: Holds XP. Can also collect XP, toggled by right-clicking the block with a redstone torch. Also retains XP when picked up and placed elsewhere.
