IBM Mech

IBM Inspired Keyboard Design

Artisan Boards
g Heavy Industries [$$$]
Germ at g Heavy Industries is an amazing designer with a love of Steno, low-profile switches, and small keyboards.
Germ is an artist in simple, industrial design. He offers a number of MX variants: with reasonably no hotswap variants.  The Ginny: Heavy keyboard limits inputs to 10 keys, which can be used to type in variants of Steno.

Website          |          Instagram
OLKB [$$]
OLKB has amazing offerings for ortholinear keyboards – both at 40% (Planck) and 60% (Preonic). They were created by the creator of QMK, so offer great programmability. 

Website          |          Instagram         |          Drop
Tex-Design [$$]
Tex Designs focuses on number of artisan IBM-styled keyboards – with pointy-stick and mouse buttons. From smaller 60% (Yoda II) to the 7-row SA (Kodachi), they offer several form factors. The coolest part is that they managed to design to use MX switches and normal keycaps (with slight modifications for the pointy-stick).

Think different, Make different

Website         |         Facebook
Keeb.io [$$]
Keebio focuses on a PCB designs for a number of ergonomic keyboards.  Most combinations need to be purchased and assembled, but the offer some prebuilt designs.

Website          |          Instagram
normal completes
Keyboards come in many different shapes & sizes. Here are some noteworthy links for starting a search. And keyboards I have heard specifically good things about. 
Keychron [$$]
Offering a variety of 65% to TENKEYLESS options, Keychron excess at offering a hotswap, RGB, and aluminum chassis at a very cheap price.
In my experience, I have some issues with their Bluetooth and lack of QMK, but ignoring/accepting those problems, one finds a really decent keyboard.

Website          |          Instagram
Keycaps
Novel Keys [$$]
Although Novels Keys offer a variety of PCBs, apparel, and switches. They also offer a variety of keycap options. Several of which manufactured by GMK.

Website          |          Instagram
Pimp My Keyboard [$$]
A part of the Signature Plastics company, they allow the purchasing on keycaps in many profiles (DSA being one of their most offered). 
They allow the purchase of just specific keysets to suit your needs (for 60%, TKL, or Ortho). This also helps in the creation of various colorways.

Website          |          Instagram
Cases
Switches