A family of low-dimensional molybdenum and tungsten-based nanomaterials is morphologically impressive. It consists of nanowires [1], nanotubes [2], nano-onions [3], nanoribbons, as well as monolayers [4], nanobuds with nano-onions attached on the surface of the nanotubes [5], nanopods called ―mama‖-tubes [6], where nano-onions are spontaneously grown inside nanotubes, etc. Two decades ago, the MoS2 and WS2 nanotubes were firstly synthesized using chemical transport reaction [7, 2]. Due to a slow growth rate, they contain a very small density of defects. They size from 20 nm to several μm in diameter and up to several millimeters in length. After eventual collapse during the growth, they continue to grow as ribbons, which are composed of two stuck walls without broken layers at their edges [8]. Recently, these structures were studied as channels in a new generation of field effect transistors (FET). Transistors based on MoS2 nanotubes and nanoribbons [9] show semiconductor properties of n-type with (ON/OFF) current ratio of more than 103, well above the previous best result (60) in MoS2 NTs prepared in other ways. The second method was a template-sacrificed process in which MoxSyIz or WO3-x nanowires represented the precursor materials. This process produces nanotubes with a high density of defects due to the mismatch of lattice parameters of original and final compounds. Morphologies are unique and range from nanopods with nano-onions spontaneously grown inside nanotubes [6], nanobuds with nano-onions attached on the surface of the nanotubes [5], and co-axial nanotubes with walls split to several cylinders [10]. Spontaneous partial exfoliation of these MoS2 nanotubes enables preparation of efficient solid lubricants with tribological properties exceeding those of the standard MoS2 platelets. The MoS2 NTs as friction reducer are the most effective at steel-steel contacts under high pressure and at low speed [11]. Friction was measured on a single MoS2 nanotube and a new friction mechanism was proposed [12]. In fully-formulated products, the MoS2 NTs show synergetic interactions with anti-wear and extreme-pressure additives [13].