Railway - Modelling
The 7mm Narrow Gauge Association - predominently for those modelling UK prototype 2 foot(ish)) prototypes on 16.5mm track, but is a broad church that embraces within its ranks 'truer to scale' gauges such as 14mm, as well as American 0n30 gauge.
16mm Association of 16mm Narrow Gauge Modellers - 32mm and 45mm gauge live steam, but also including 10mm 3' gauge and the increasingly popular 3/8 scale (2 foot on 45mm gauge track.
Gauge 1 Model Railway Association - 45mm gauge 1/32 and 10mm/ft scale modelling
Hallig - Vienna trams in plastic both as static and motorised HO scale models. Worth keeping any eye out for re-runs of past Vienna tram models; some of which were only available through the 'Wiener Linien' shops.
HMRS Historical Model Railway Society
Locos n Stuff - Mark Clark. Does a small but growing range of high quality 7mm NG locos and rolling stock in predominently etched brass, including a KS 'Wren and 'Brazil' - the latter in both 'stock' and Bowaters guises.
Gauge 0 Guild - Gauge 0 standard gauge predominently, and increasingly THE place to go for parts and kits for this gauge, as smaller suppliers progressively move away from the OO dominated mainstream model railway press.
Markits - Romford metal steam locomotive wheels, gears and axles, 16.5mm, 18mm, 14mm and 12mm gauges; some for Sn3 and HOn3 too
NMRA - National Model Railroad Association - American body whose track and wheel standards are increasingly being adopted worldwide.
Narrow Gauge and Industrial Railway Modelling Review - does what it says on the tin. UK and European narrow gauge modelling.
OO9 Society - UK group dedicated to narrow gauge modelling in 1/76 scale on 9mm track, and also 12mm (3 ft)
On14 Group - online group dedicated to providing information on modelling 2 ft. prototypes on 14mm gauge track in 1/43 scale.
Peco - Railway Modeller, Continental Modeller magazines, Pecorama attraction, 7 1/4 inch gauge Beer Heights Light Railway
Sedlacek Modellstrassenbahnen - RTR and kits for many Vienna trams. Range is notable for including both service vehicles and also roadside details and transfers.
Walsall Model Industries - Cast iron driving and wagon wheels in Gauge 1 and 0. Now incorporating the Agenoria Models Gauge 1, Gauge 3 - 1/22.5 scale 2 1/2 inch gauge etched kits for modern image diesels, BR rolling stock and some steam. Check out the 08 shunter in 1/32 scale.
Zamzoodled - supplier of scale chopper couplings and other stuff for 1/43 scale narrow gauge
Railway - Prototype
Australian Narrow Gauge Railway Museum Society - Woodford Railway, sugar cane transport museum and home to several Bundaberg Fowlers (and the last Fowler steam locomotive....)
Eisenbahnmuseum Schwechat - Based in the former Pressburger Bahn (now Bratislava) workshops, contains a fascinating collection of both SG and NG locomotives and stock, including a KuK Rollbahn Henschel 0-6-0.
Ghega Museum - comemorating the life and work of Carl Ritter von Ghega, civil engineer behind the first mountain railway in the world, and much more besides. By the Kalte-Rinne viaduct on the Semmering, just outside Breitenstein.
Das Heitzhaus - Eisenbahnmuseum Strasshof, 1österreichischen Strassenhahn und Eisenbahn Klub. Take the train out towards Ganserdorf, but get off at Silberwald for the museum - NOT at Strasshof!
Mödlinger Stadtverkehresmuseum . -Wonderful collection of Vienna trams and a couple of buses, with a particular focus upon the one-time Krauss steam tramway route - the 360 - that ran out to the town via Heitzing, Lainz, Rodaun, and Perchtoldsdorf.
Museumsbahn Mladejow - two 600mm gauge Engerth locomotives are based here, one of which was converted from a WW1 Austrian 'Rollbahn' 0-6-0 after the war. Railway is also focus for annual WW1 re-enactment event.
National Tramway Museum - Crich, Derbyshire Peak District
Workshop - Tools. Model Engineering supplies
GLR Distributors - source for ex-Kennions live steam castings , and model engineering materials and tools.
Smart and Brown - Spare parts for Smart & Brown and Pultra lathes. I think they will still also supply new Smart & Brown machines to order, including angular contact bearing headstock Pultra 1770 and 1750, and Model L. Based in Shefford. <
Lathes UK - on-line machine tool archive with manuals and specifications of lathes, milling machines, shapers etc. Some spares for Boxford and also source for belting - including Unimat SL
Tracy Tools - Drills, taps and lathe cutting tools. Prices don't seem to be that much more than for Chinese-made stuff, plus you get the option of HSS, and they also do many of the odd thread sizes that are now getting harder to get.