Additive manufacturing - 3D printing - is evolving so rapidly that it's hard to keep up. Here are 8 of the most important 3D printing technologies, explained in layman's terms.

2. Markforged Onyx One
Markforged X3
Many FDM models from
numerous OEM’s worldwide
FFF uses a string of solid material (filament), pushing it through a
heated nozzle and melting it in the process. The printer continuously
moves this nozzle around, laying down the melted material at a
precise location, where it instantly cools down and solidifies. This
builds up the model layer by layer. A unique professional-grade
filament made of chopped carbon fiber named Onyx is used.
Models available:

3. Markforged Onyx Professional
Markforged Mark Two
Markforged X5
Markforged X7
Fiber-reinforced FFF printing was introduced by Markforged as the
world's first CCF printer. Combining carbon-reinforced nylon with
revolutionary continuous fiber results in amazingly strong (as
aluminum) parts. Print end-use reinforced parts in lightweight
continuous Carbon Fiber, Kevlar and (High Temp) Fiberglass with
remarkable strength and dimensional stability.
Models available:

4. 3DS ProJet CJP 360 (mono)
3DS ProJet CJP 260C (CMY)
3DS ProJet CJP 460 Plus (CMY)
3DS ProJet CJP 660 Pro (CMYK)
3DS ProJet CJP 860 Pro (CMYK)
CJP involves two major components: core and binder. The core
material is a premium composite spread in thin layers over the build
platform with a roller. After each layer is spread, color binder is
selectively jetted from inkjet printheads over the core layer, which
causes the core to solidify. Multiple printheads provide the best
range of accurate and consistent colors, including gradients. The build
platform lowers with every subsequent layer, resulting in a full-color
three-dimensional model.
Models available:

5. 3DS ProJet MJP 2500
3DS ProJet MJP 2500 Plus
3DS ProJet MJP 3600
3DS ProJet MJP 3600 Max
3DS ProJet MJP 5600
MJP builds up an object by jetting a photopolymer though a printhead
before solidifying it using a UV light. It combines professional grade 3D
printing capabilities with an affordable price, an office-friendly
footprint and easy part processing. Advantages include true-to-CAD
quality and accuracy, superior edge fidelity, smooth surface finish, and
rigid or elastomeric materials for true functional testing.
Models available:

6. 3DS ProJet 6000
3DS ProJet 7000
3DS ProX 800
3DS ProX 950
Stereolithography is a 3D printing technology that works via
a process called vat photopolymerization.
Objects are built in layers using a laser beam to trace out and solidify
each successive layer of an object on the surface of a vat of liquid
photopolymer.
Models available:

7. 3DS ProX SLS 500
3DS sPro 60 HD-HS
3DS sPro 140
3DS sPro 230
SLS technology uses a laser to harden and bond (fuse/sinter) small
grains of plastic, ceramic, glass, or other materials into layers in a 3D
dimensional structure. The laser traces the pattern of each cross
section of the 3D design onto a bed of powder. After one layer is built,
the bed lowers and another layer is built on top of the existing layers,
until every layer is built and the part is complete.
Models available:

8. Markforged Metal X
An industrial metal printing method by Markforged, using metal
powders encased in plastic binders. When the plastic is melted off, the
metal powders can be arranged in exquisite shapes. The plastic
dissolves and the metal is sintered into a design. The process works
layer by layer as metal crystals pass through the bonds of the printed
layers. This allows for an entire part to be created seamlessly with
immense structural durability, speed and accuracy.
Models available:

9. 3DS ProX DMP 100
3DS ProX DMP 200
3DS ProX DMP 300
3DS ProX DMP 320
3DS ProX DMP 100/200 Dental
DMP (just like SLS) uses a laser to selectively heat and fuse a bed of
fine metal powder, in order to build up a 3D object in layers. Also
referred to as Direct Metal Laser Sintering (DMLS).
DMP printers create chemically pure, fully dense metal parts,
delivering accuracy and repeatability of about 20 microns in all three
axes. Materials include stainless steel, tool steel, super alloys, non-
ferrous alloys, cobalt-chrome, titanium and aluminum.
Models available: