This is the IRIS LEGO 6-Case Workstation and Storage Unit

There is a smaller version with three drawers.
IRIS LEGO 3-Case Workstation and Storage Tabletop with 1 Base Plate

This is another design called the BOX4BLOX Lego Organizer.

If you don’t have a large enough collection to warrant drawer-type organizers. Here are some options using bins:
LEGO 4-piece Square Stacking Basket Set with Wheels TSB-SQ

or the
Lego 4PC Project Case Set each case of which has dimensions (3.125″H x 13″W x 12.25″D).

This is an interesting possibility: The Container Store LEGO Storage Brick (2×4), which comes in several colors

which also comes in a smaller size
The Container Store LEGO Storage Brick (2×2)

and smaller still…
The Container Store LEGO Storage Brick

and smaller still!
The Container Store LEGO Storage Brick

or you can always revert to the plain white IRIS 6 Drawer Cart

Be sure to check out our older posts on LEGO storage:
Colorful LEGO Storage Ideas
Storing Your LEGO Collection