• Platinum Watch + Copper Wire = Detonator
• String + Soda Can = Soda Can with String (Works as an alarm system, when placed e. g. on a door.)
• Marbles (Enemies can slip on those when placed on the ground.)
• Metal Rod + Spring = Rod and Spring (Reduces firing costs of burst modes on weapons.)
• Steel Tube + Glue + Duct Tape = Gun Barrel Extender (Increases firing range of weapons.)
• RDX Crystals + C1 = C4 (Increases explosive power.)
• RDX Crystals + TNT = HMX (Increases explosive power.)
• Fumble Pack + Gum + X-Ray Tube = X-Ray Device
• Gameboy + Utility Knife = Lameboy Display
• Lameboy Display + Copper Wire = Display Unit
• Display Unit + X-Ray Device = X-Ray Detector
• Certain Armors + Compound 18 = Improved Armor
• Certain Armors + Royal Jelly (Sci-Fi only) = Improved Armor (Better than Compound 18.)
• Normal Cloth + Knife = Rag
• Rag + Alcohol = Molotov Cocktail
• Bloody Knife + Rag = Clean Knife

• Laptop
• Portable TV
• Rubber Band
• Sleeping Bag

allegedly:

portable TV + Batteries:
Arulcan administrative & military personel will stand at attention when the national anthem is played at 6 & 12 AM and PM.
Only works up to 3 tiles from city sectors that are under enemy control (= still broadcast national tv)
Each turn the victims are granted a save(+20 modifier) vs wis , success ends the charm.

Sleeping bag + duct tape : tape around head to prevent certain mercs going "nervous",
the device also increases suppression tolerance by 50%. May cause various negative effects ;)

Laptop : Play Arulcan national anthem in a loop for up to ~ 5h with a '99 notebook, unless you had an oversize battery in one of these:

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click on pic to enlarge

scnr;)