Tunnel Borers
The Brotherhood, over the course of its existence, has been very good at digging holes. From the tunnel networks of the First Tiberium War, to the global underground of the second, they had become extremely good at managing entire networks of hidden transport. The expansion of underground tiberium put paid to that, at least for a time. However, more recently, the Brotherhood has resumed work on various forms of digging machines, although these are more for munitions and assault than permanent infrastructure construction assets in most cases. The threat of underground Tiberium has not gone away, but the ability of people like Krukov to use Gana as a replacement for valuable soldiers has made it possible to throw these weapons into entrenched GDI positions to create chaos and destruction among GDI's lines.
Field Refining
While the mainstay of the Brotherhood's refining methods have been the Pascal-Kane method, later refined by Abdul Karem's revisions to the process, they have often been forced to resort to far more expedient methodologies. While far less efficient than larger scale options, it is something that can be crammed down into mobile assets, or done with the relatively limited means available to many of the smallest and least capable of the Brotherhood's warlords.
Autodocs
Autodocs are a Brotherhood technology that has received less attention from both sides than is really deserved. A keystone piece of the technological makeup of CABAL's cyborg legions, autodocs are a significant step towards closing the repair gap between meat and metal. While there is likely to be civil pushback against the widespread deployment of such systems, it is something that will also significantly drop the cost of healthcare, with automated systems replacing and supplementing doctors on a wide range of routine procedures.
Chameleon Ware
Chameleon Ware is a form of smart material that takes on the texture and color of the material around it on a single side. This makes it a supremely capable form of camouflage, and something that the Brotherhood uses widely for its Shadow teams, among other assets. The trick is actually in the texturing. While variable color schemes on a single material are a long known piece of technology, it often has a distinctly opposite effect to effective camouflage at shorter ranges, where the flatness of the effect causes the shape to become distinct, even if the color is not.
Fast-Twitch Myomers
The Brotherhood's work on various forms of walker have yielded some results that are quite different from the way that GDI has done things. One of those is essentially a form of "fast-twitch" myomer. On a human or other animal, there are combinations of fast- and slow-twitch musculature. GDI's version of myomer is almost entirely focused around slow-twitch musculature, intended to balance and support a particularly heavy chassis. Brotherhood's systems are combinations of fast- and slow-twitch myomer bundles: one set for rapid repositioning, and the other for offering sustained strength. When applied to legs, these fast-and-slow combinations give great potential for an enhanced ability to bound, leap, and hop across a battlefield.
Last-Generation Stealth
Stealth technologies have been an ongoing race between sensors and countermeasures. Active stealth combines a number of methods to both avoid detection and degrade sensors. Back in the Second Tiberium War, the Brotherhood's stealth tanks carried a significantly weaker stealth field generator, and a significantly lighter load of missiles, a compromise forced by the limited power supply and a lack of good fire and forget missiles. In the modern day, these older stealth units are deeply obsolescent, with most Brotherhood targeting systems able to see through their stealth without too much difficulty at even medium ranges.
Modern Particle Weapons
The Brotherhood has quite a number of advanced energy weapons technologies, some of the most effective are their particle beams. These are one leg of three very closely related technologies, namely ion, plasma, and particle. In practical terms all three are effectively the same thing with some minor and not so minor differences in use, design, and functionality. The most advanced Brotherhood particle beams came about due to the work of the LEGION and the Marked of Kane. While other factions have tended to use various forms of plasma bolt weaponry, the thousands of cyborgs left littering the sides of Cheyenne mountain were a wealth of information leading to improved particle weapons. While much of it has taken nearly a decade to actually work the kinks out of, they are some of the most refined versions of this technology that GDI has ever worked with.
Biowarfare
Biowarfare has been a part of the Brotherhood of Nod's arsenal for quite a long time, with biological research on both the macro and micro scale operations having been ongoing from the very beginning of their open operations. On the macroscales, it has been a series of attempts to work with Tiberium mutation on both human and animal test subjects. On the microscale, it is a mix of tailored bacterial and viral weapons intended to target specific strains of crops, animals, fungi and similarly valuable targets. For obvious reasons, much of this research will be focused on counter-agents or vaccines against these bioweapons.