There have been some discussions around foldable MTB recently, therefore I'm sharing the links that I collected for folding mountain bikes, e-bikes, and frames. Endorsements are certainly not implied, since I have no experience with any of these. Please feel free to reply and add to the list.

Nicolai: Helius CC Travel
http://attitudebikes.wordpress.com/2...helius-travel/

Nicolai: Helius AC Travel
http://www.mobile01.com/newsdetail.php?id=10581

Slingshot: Fold-Tech
http://www.slingshotbikes.com/mountain-foldtech.php

Montague / SwissBike: Various models
http://www.montaguebikes.com/folding-mountain-bikes/

Dahon: Flo and (maybe) Jetstream
http://www.dahon.com/folding-bicycles

Oyama: Various models
http://www.oyama.com/products.asp?le=tchinese&fid=361

Change: MTB folding bikes and frame
http://www.changebike.com/full-s-fb.html
http://www.changebike.com/mtb-f.html

Bazooka: Navigator and Dakar
http://www.bazookasports.com/folding-bikes-c-1.html

Wachsen: BM-200 / Hanwa: Trailer MTR-2618
http://www.b-grow.com/wachsen/bm-200/
http://www.b-grow.com/freeweb/mtr-2618/

Irland / Ginori: 26" alloy folding bike
http://www.irland.com.tw/ProInfo.php?id=23
http://blog.yam.com/reginald82091/article/31416390

Hummer badged: Various models
http://www.hidesawa.com.tw/products_2333-tchinese.html

Land Rover badged: Various models
http://www.gic-bike.com/landrover/goods/index.html

Lock N Roll (US) / Urbanite (UK): Folding mountain bikes
http://www.amazon.com/Speed-Folding-...dp/B002HYRFX2/
http://www.amazon.com/Speed-Folding-.../dp/B001F05W2K
http://www.amazon.co.uk/Urbanite-Alu...dp/B004PZL1UO/
http://www.amazon.co.uk/Urbanite-Alu...dp/B004PZJ5K2/

Greenpath: Pathfinder Electric Folding Mountain Bike
http://www.greenpathelectricbikes.co...mountain-bike/

e-Moto: Ridge 3.0 Power Assist Folding Mountain Bike
http://www.emotoev.com/products/bicy...ntain/ridge30/

X-Treme Scooters: Electric XB-310Li
http://www.x-tremescooters.com/elect...i/xb310li.html