This is a pack that contains a decent list of mods for creating adventure mode escape rooms.
ComputerCraft and ProjectRed are great to drive your puzzle functionality. The computers are great for writing quick scripts for a solver to input the passcode or password. The command computers are essential for detecting puzzle states and performing functionality when the puzzles are completed.ProjectRed is of course great if instead you prefer more of a redstone style approach.
DecoCraft and ArchitectureCraft are perfect for making your themed escape rooms come to life.
Journeymap is convenient for setting teleport points for each room or puzzle.
Bibliocraft makes importing custom textures really convenient. PNGs support an alpha channel (translucency) so make sure to take advantage to create fancy overlays or obscured info.