Tony Stark was behind for some of the best MCU devices from Iron Man to Endgame. Viewers learned about new technology that Tony invented but wasn't able to show off until after his death. Tony's creations are all remarkable, and although some are really one-of-a-kind, many are inspired by—or incorporate elements of—the Iron Man suit.
Tony created the Mark I Iron Man suit soon after his MCU debut, and it has undergone several substantial advancements since then. He's also made suits for a few of his close buddies. While Tony's Iron Man armor is by far the best thing he's ever built, there are lots of other inventions that can compete with it.
#1 The Time-Space GPS Device
The elegant bracelet that enabled the wearer to effectively traverse across the Quantum Realm with pinpoint precision was the coolest and possibly most useful gadget Stark ever developed. The Avengers were only able to pull off the time heist effectively, or perhaps at all, because of this technology.Even though Stark is no longer alive, his impact on the MCU's technology can be seen in Parker's E.D.I.T.H. glasses and Sam's updated Falcon wingsuit. With Ironheart on the horizon, Stark's technical legacy should be carried over into Phase 4 and maybe beyond. Some fans feel RDJ could even reprise the role for Riri Williams in a J.A.R.V.I.S.-like capacity, which would be fantastic.
#2 J.A.R.V.I.S.
Tony had basically already created the armor around the planet that he imagined (in J.A.R.V.I.S.) without recognizing it long before Ultron raised his ugly head. The J man was not just in charge of the day-to-day operations at Stark's Malibu mansion and beyond, but he was also built into the Iron Man suit as a remarkably interactive os.J.A.R.V.I.S. not only entertained viewers with clever banter and snarky comments, but he also managed all of the machinery in and surrounding Stark Tower, which is quite an accomplishment. Before being transferred into the Vision's head, he was even able to unconsciously prevent Ultron from obtaining nuclear launch codes.
#3 Stark-Tech Pass Down For Tony's Friends & Allies
Tony created a suit for himself at first, but over time, he chose to share his fortune with a handful of his dearest friends. After taking a working model from Tony on his birthday, his best friend, Rhodey, becomes War Machine. In the last fight of Endgame, Pepper even dons a variation of the Rescue armor.Tony also makes a few Spider-Man suits for Peter Parker, as well as a variety of other armors with specialized tasks, like the Hulkbuster armor, which was created to combat the Hulk. In the Ironheart miniseries, it's also expected that Riri Williams would use Stark-Tech to create her own armor.
#4 E.D.I.T.H.
Tony was a fashionable guy in addition to his intelligence, generosity, riches, and popularity with the women. Tony's sunglasses with a small H.U.D., which allowed him to do studies similar to the full-sized H.U.D. in his Iron Man suit, were one of his favorite items.Tony also gives Peter Parker a pair of spectacles that he calls E.D.I.T.H., which means for "Even Dead, I'm The Hero," when he passes away. These glasses were capable of doing everything Stark's pair could, as well as commanding a large fleet of armed drones, which became devastating in the hands of the wrong people.
#5 Holotable System
Tony's Holotable is a fantastic piece of technology that, among other stuff, allows the user to interact with a software system in the physical world. Tony has put this incredible innovation to a variety of uses, including upgrading Iron Man's armor and running simulations in Endgame to figure out where to go across time.In Iron Man 3, he utilizes a variation of this technology to examine a murder scene where Happy was put into a coma. Tony was able to examine a large region of the crime scene, do real-time computations and extrapolations, and compare energy fingerprints to global events while boosting critical information. Any work would be made a little simpler and a lot cooler with tech like that.
#6 The Mark XLII's Telepresence Headset
In Iron Man 3, one specific piece of technology took viewers by surprise twice. The first instance was when Pepper returned from work and attempted to separate Tony from his outfit. He implies that no one is wearing the suit, but it isn't proved until Pepper walks downstairs and discovers Tony performing pull-ups.Later in the movie, Tony arrives in Air Force One just in time to prevent 13 people from dying. After an amazing action scene in the air, he succeeds to save everyone. Tony turns to depart but is hit by an oncoming vehicle, which smashes the Mark LVII to bits, exposing that Tony was once again operating his armor remotely from miles away.
#7 Arc Reactor Technology
Tony successfully downsized the arc reactor, which was a massive energy source. While his father may have invented the arc reactor as a PR gimmick many years ago, it became a lot more helpful after Tony discovered a purpose to invest in the research that he cared about.The original micro-arc reactor was created to prevent shrapnel from entering Tony's heart, but it also served as the source of power for the initial Iron Man armor before Tony began putting them in the armor. In 2012, Tony exploited arc reactor tech to provide 100 percent renewable energy to Stark Tower.
#8 Nano Gauntlets
While technically part of the armor, they can be used separately for particular purposes. The first gauntlet is seen during the Civil War when Bucky manages to elude capture after the Winter Soldier programming is turned on. With a sonic blast and a blinding light, Stark incapacitates Bucky with the gauntlet. Bucky tries to shoot him, but Stark uses his gauntlet to deflect the bullet.The nano-gauntlet he constructs in Endgame is the more well-known gauntlet, which is designed to contain the tremendous quantities of energy released by the Infinity Stones. Hulk used it to resurrect everyone, and Thanos tried another Snap with it, but this time without the Stones since Tony had taken them for his ultimate heroic deed as Iron Man.
#9 Repulsor Technology
When Tony initially uses Stark Industries' proprietary repulsor technology to the Mark II, he just attempts to utilize it as a flight stabilizer. After destroying a handful of windows, he quickly discovers that the repulsors can cause some damage.Tony immediately fitted them as guns and thrusters inside the outfit. Tony has used repulsor technology in a variety of ways throughout the years, including updating S.H.I.E.L.D.'s (Hydra's) helicarrier engines to enable them to stay aloft indefinitely.
#10 Suit Assembly Mechanism Evolution
Pepper comes in on Tony trying to remove the armor after his first unauthorized trip, and it's a disaster. With the aid of Dum-E, Tony has a rough mechanism that tries to separate portions of the armor, but it appears to be an inefficient and unpleasant procedure.He has a suitcase edition of the suit in Iron Man 2, and by the first Avengers film, Tony's Stark Tower system is so sophisticated that it effortlessly separates each component as Tony walks down the runway into the skyscraper. In Civil War, Tony also possesses a highly advanced airplane that, with the touch of a button, envelops him in his armor. Stark eventually progresses to nanotechnology, the ultimate mechanism.