Victor Stone, aka Cyborg, has a long history as a Teen Titan and is now a key member of the Justice League. When Darkseid invaded Earth, Vic was caught in the invasion and mortally wounded. Victor's father, Silas, saved his son using Apokolips technology and a Mother Box. This saved Victor's life but left him more machine than man--a living Cyborg.
Cyborg has a wide array of weapons at his disposal with which he fights for justice and protects the innocent. He more than earns his keep on the Justice League, and he does so in part with the incredible technology and armaments at his disposal.
10 Sensor Array
The first of Cyborg's incredible arsenal isn't something that is, strictly speaking, an offensive weapon. It's his assortment of sensory devices. Victor Stone's technological enhancements put him on par with Superman and Martian Manhunter in terms of their ability to detect danger.
It would be incredibly difficult to catch Cyborg off-guard--and very few are capable of doing it.
9 Laser Cannon
This one is fairly basic when it comes to science fiction superheroes, but it's still more powerful than any weapon Batman has in his arsenal. Cyborg is able to manifest a laser cannon from his arm that can knock the likes of Kalibak on their back.
It's an expected weapon, but it's certainly useful and a necessity if you're going to fight the unknown forces from time and space that are looking overtake our world.
8 Multiversal Attunement
This one isn't technically a weapon either, but it is an incredible ability. This ability, which only recently surfaced, boosts Victor's already brilliant mind and the super-powered computer processing ability of Cyborg's systems.
Cyborg is now attuned to the multiverse itself and able to predict the likely outcomes of actions and events. He can more-or-less predict the future now, and he is smarter than he's ever been before.
7 Transforming Tech
This one does make ranking Cyborg's weapons a little difficult because he kind of has every weapon imaginable at his disposal. Cyborg's hyper-advanced technological augmentations are able to change and morph into whatever weapon that Victor can imagine.
This ranges from blades to missile-launchers to science fiction super weapons that he's encountered on his adventures with the Justice League. Like Blue Beetle, aka Jaime Reyes, there is nothing technology-based that is off the table for Cyborg.
6 Mechanical Interface
On top of that, if Cyborg can't manifest a weapon, he can at least access the control interface of whatever weapon that is. No matter where the computer is from, who built it, or what alien language it uses, Cyborg can interface with it.
It isn't always easy, but Victor is usually able to crack it. This isn't limited to weapons of course; Victor can access information, control vehicles, open doors, or shut the entire system down if need be.
5 Omegadrome Armor
This one goes back to before the Flashpoint. At one point, Cyborg's humanity became almost completely repressed, and he became the being known as Cyberion.
Later, Cyberion would place Vic Stone's consciousness into the Omegadrome armor. The armor is a liquid metal that allows Cyborg the full ability to shape-shift into whatever form he chooses. Importantly, it also allowed Victor to appear human if he so chooses.
4 Boom Tube Projector
Thanks to the Apokolips technology integrated into his body, Cyborg has the ability to project Boom Tubes, which are large teleportation portals that can take one almost anywhere in the universe in an instant. Originally, there was a caveat that one out of every 1,000 Boom Tubes would take Cyborg and his companions to Apokolips, but that no longer seems to be the case.
Cyborg was able to improve on the design with "Hush Tubes," which were portals that didn't make an explosive sound whenever they were deployed and were far harder to detect.
3 Element X
Cyborg and the rest of the Justice League gained access to "Element X" or the "Tenth Metal" during their mission in the Dark Multiverse during Dark Nights: Metal. It is the material from which Mother Boxes are made. The full extent of Element X's ability is unknown, and it's not really clear if Cyborg himself still has access to it.
However, it is known to give its user clairvoyance, enhances the user's abilities, and can change reality itself to a certain extent. It was pivotal in turning the tide against Barbatos and the Batman Who Laughs.
2 White Noise Cannon
Possibly Cyborg's most famous weapon is the White Noise Cannon. It is his primary weapon and is even more powerful than his basic laser cannon. It uses an intense sonic blast to cause massive damage to its target.
When Cyborg first used it, the White Noise Cannon reduced a pair of Apolokips Parademons to shreds. It's been his primary weapon ever since, and it is easily one of the most useful weapons in his arsenal.
1 The Mother Box
Of course, nothing can compare to Cyborg's Mother Box. It is the device around which all other of Victor's upgrades are built. The full potential of a Mother Box is deliberately vague, and Cyborg avoided accessing its power until fairly recently. It is the item that has granted Victor his attunement to the multiverse itself, and Darkseid recently used it to turn Victor into a New God. It draws upon energy from the Source and is capable of reality manipulation and granting its wielder immense power. The Mother Box could potentially make Cyborg the most powerful member of the Justice League--he need only to learn how to properly use it.
Cyborg's Mother Box was initially referred to as a Father Box, the Apokolips counterpart to the Mother Box, but that seems to have been retconned.