Trap Collection
Some Traps
Amazing Goblin Trap
A Handful of Traps
Natural Traps
Obvious Traps
Trapmaking 101
Traps Revisited (Unearthed Arcana)
On Traps and Tricks
On Tricks, Empty Rooms, and Basic Trap Design
Making Traps Fun
WallyDM YouTube Channel
WallyDM's book of puzzle encounters
DungeonVault Puzzle collection
60 Dungeon Puzzles to confound your players
More Dungeon Puzzles
Puzzle Doors
Puzzle Ideas
Riddle Collection 1
Riddle Collection 2
D100 Riddle Table
100 more riddles
Lever Riddle