Some kind of pilot mask attachment or module for Sinus Refactor
Gill similar chrome for Sinus Refactor
Having some kind of ridiculous color changing/cosmetic options for cyberchest, genitals, etc would be fun. Like the skinwatch in terms of function. Maybe it can display text?
Bouncy/running leg modules for cyberlimbs. Always liked the weird prosthetics people use for running IRL, having an equivalent for SD would be fun.
Armor modules for exoskeletons or limbs would be fun, since cyberlimbs limit dermalweave effectiveness now.
AutoTune/Robo voice module for Tracheal Implant - fun with disguises or just being T-Pain
Scream/Shout Mod for Tracheal - Shout more rooms away, when speaking loudly takes a custom color. Fun for Judges and intimidation kinda things.
Modules for Skinwatch, Knux, etc on cyberlimbs - don't know if you can install things into cyberarms like that, but would be cool if you could. Maybe with even more functionality because they don't need to be discrete.
Lethal Mod for Defib Hands - I mean...its on the tin here. Might even be a fun thing for a cybertech to cook up.
Like to see a Robocop style holster. Acts as a safe if you die and its not out. They can take the leg, but they aren't getting your gun out.
Small storage spaces. A place to keep your chyen or your wallet that isn't in your inventory and doesn't show on a frisk. Drives or smaller items under a certain volume or weight.
Sprinter mods, makes you run faster.
Absorbent mod, impact/shock absorbent material helps lessen the impact of a hit to said area.
Lighter mod, "Hey you got a lighter" flicks off the fingertip and fwooosh light.
Feet claws, yes claws, like nailz but for your feet! "Could tie into martial arts."
Unnatural movement mod, Makes you be able to twist your limbs into unnatural ways, maybe helps you be more 'agile'?
Arm cannon, One shot then reload, works like a shotgun, just spraying lead in one direction before a new shell needs to be inserted, could be used as a show starter or finisher.
Detachable and replaceable limb ends in general. So you could take of your hand and replace it with a tool, take off your feet and replace them with roller blade feet...
Ooooo Roller blade feet!
Limb tractors would be cool as well, a way of tracking down stolen limbs.
And finally, what about simple extravagance for elite corpos or flash gangers. Things like a comb finger, umbrella arm, bottle opener elbow, finger lighter. Fighter lighter sounds awesome.
Detachable, controllable hands if you have dual cyber arms. One hand detaches to become a robot, the other arm becomes a controller interface for said detached hand.
That's not a mod, that's a cyberlimb.
Ooooo Roller blade feet!
That's not a mod, that's a cyberlimb.
Tools - mechanic, robotics, cybernetics, medical. All part of different took packages for your cyberarm or an additional appendage that has those features.
Those could be mods. Maybe.
Jump mods, when jumping from a to b absorbs the impact greatly, lower risk for hurting.
Sprinter mods, makes you run faster.
Absorbent mod, impact/shock absorbent material helps lessen the impact of a hit to said area.
Lighter mod, "Hey you got a lighter" flicks off the fingertip and fwooosh light.
Good mods ideas.
Lethal Mod for Defib Hands - I mean...its on the tin here. Might even be a fun thing for a cybertech to cook up.
defib hands, trachs, etc don't have mod slots.
LeadLegs - Compared to the agility booster one, this one makes it harder to escape, but better at guarding, not being pushed off stuff, and similar activities. Hold your ground.
GeckoHands - for those few very annoying things where slipping off while climbing is a thing, this would help limit that. Hooks, ladders, etc.
more embeddable gadget mods - ie lighter fingers as people have already said, pop out flashlights etcetera, storage compartment mods that allow users to stash a small item away, hand shocker mods for easy self defence
The bottom line is that chrome is expensive and it makes you an attractive target, and more often than not, having it is a significant risk that can make it impractical. Some modules to mitigate that risk and make the chrome-snatching business a little less lucrative may be in order.
-If not already, different advantages/disadvantages to the coatings that are available currently.
-Scanner installation like a weapons scanner, cyberware scanner, bug scanner (think -airports and those handheld metal detectors, but of the future)
-Deployable arm shield, gives a bonus when protecting someone?
-instrument slot, so you can program your hands to play music (like an old time piano)
-Nanotech self-repair module – allowing cyberlimbs to self-repair. Similar to how the body recovers from wounds.
-ViseLock/MagLock hand mods, hold fast to what's in your hands. Avoid disarming, aid in maintaining a grapple once applied successfully
-Double-jointed/Joint-reversing mods, allowing for greater range of motion, easier grapple escapability.
-Temperature regulating mods for extreme environmental conditions.
-Re-writable Fingerprint mods
Mods that I would like to see.
An interface that would allow you to use "decking/electonics" skill against different objects in the world. Maybe let you see who used a streetterm last, or get bank info at an ATM. Who was last to use a lock. Bonuses to checks for cracking E-Notes/Locks. This could be multiple devices if balance requires it.
Smuggling Space. Something that can bring something through detectors undetected.
Climbing pads. Tactile, magnetic pads that let you adhere to surfaces.
Hydraulic arm module: [plus Strength, minus Agility]
Hyperextension module: adds increased range of motion to the arm and wrist's joints, but also weakens them. [Plus Agility, minus Strength]
Motion to energy recharge module: use's the body's motion to help power the limb. You can go for longer, but at a lower max effort. [plus Stamina, minus Toughness (the Endurance substats)]
Redundant motion system: the limb can take more damage than usual and remain functional, but costs more energy to use. [plus Toughness, minus Stamina]
Spring-loaded joint action: [plus Quickness, minus Coordination (the Agility substats)]
Hardened joint bearings: [plus Coordination, minus Quickness]
I think the idea of trading off substats is interesting in general.