Service Provider List
This list is researched and maintained by apertus. Please do not add your own businesses here - they will be removed.
1 3D Printing
http://i.materialise.com - 3D printing service, also does stainless steel, alumide and titanium printing. Located in Leuven, Belgium
http://www.ponoko.com - plastic and steel 3d printing, aluminum plate cutting service provider in the USA
http://www.shapeways.com - plastic (from 1.40$/cm³), aluminum (from 1.75$/cm³) and steel (from 8$/cm³) 3d printing service provider in the USA
http://www.4d-solution.com - SLS 3D printing: plastic, alumide, etc. in Germany
From SatNOGS:
3d Printing at a Fab Lab or your local hackerspace: If you don't have your own 3d printer, then a local Fab Lab or hackerspace may be able to do it for you. Fab Labs and hackerspaces are places that have invested in the machinery and you can take the designs to them. Generally they need .stl files to import into the software that runs the machines, but this should be discussed with the Fab Lab or hackerspace. You then pay for the material, time or a combination of the two for each of the parts or any other agreement in place.
T Slot - If you don't want to cut the pieces yourself, then you may be able to find a supplier that will do this for you. (Here's one in the United Kingdom.)
Also take a look at this far more comprehensive list: http://www.opencircuits.com/PCB_Manufacturers
By far the cheapest way to get PCBs for prototypes in low volume, takes some time though (2 and 4 layers only), no assembly service
By far the cheapest way to get PCB stencils in low volume
Similar to OSHPark but Made in Germany, also offers components and stencils (no assembly though), limited to two-layer boards currently (4 layer in Beta)
Affordable PCB manufacturing (2-14 layers) in Germany
Also creates SMD stencils for just a bit more than 100€
http://www.multi-circuit-boards.eu/
Affordable PCB manufacturing (2-28 layers) in Germany
steel SMD stencils for much less than 100€ (smaller sizes even for 35€)
USA based PCB manufacturer, said to be very fast and reliable, not the cheapest
PCB assembly/testing in Austria
PCB manufacturing in Germany
http://proplace.se (website offline - company alive?)
PCB Assembler in Slovenia
PCB Assembly Services in US
PCB Assembly Services in Canada
Prototype PCB manufacturing in Slovenia
PCB Assembly in Czech Republic
high volume PCB manufacturer in Slovenia
PCB manufacturer in Slovenia (only 2 layer PCBs and stencils)
PCB Manufacturing and Assembly in USA
PCB Assembly Services in Germany
http://www.prodesign-europe.com/EN_PCBLayout.html
PCB Assembly Services in Germany
http://www.pcb-pool.com/ppde/info_pcb_assembling.html
PCB Pool - PCB manufacturing and assembly for small quantities with good prices located in Germany
http://www.we-online.com/web/en/wuerth_elektronik/start.php
PCB manufacturer for high density or special PCBs in Germany
PCB Assembly in Vienna
PCB manufacturing in Vienna
Online PCB prototype and assembly manufacturer in China
3 EMI Testing
http://ww2.bluetechnix.com/en/bluetechnix/home/
https://www.tgm.ac.at/index.php?id=66
http://www.streamunlimited.com/v3/en/emc_laboratory.html
4 Misc
http://www.firstcut.eu (standard 3 business day lead time)
CNC milled AXIOM Alpha lens mount there
Affordable Grip handles, knobs, wheels
Boutet in France
http://www.s-w-pulverbeschichtung.at/
Sandblasting and Powder Coating services in Austria
5 Battery Related
http://idxtek.com/product-category/v-plate-accessories/
Good quality V-mount plates that cost 100€ +
Cheaper V-mount plate from China - all plastic, not so rugged - but quite OK for the price