I recently conducted a check of all the websites that I have listed for active metal manufacturers (and dedicated distributors). I was disappointed to find that several websites could not be accessed. They are listed below. Please contact me if you can provide further information, especially if you know of a new site replacing the one listed.
25mm Ancient Range
Aude Historica (Italian site remains up, but English version is down)
20mm ranges: First World War, Italian Unification
In addition to a small range of their own figures, CW Toys distributes a number of metal ranges by other manufactures, some of which are exclusive to CW. UPDATE: As of August 5, this site was back in business, which is great news. Thanks to Tom P. for pointing that out.
Sole distributor for Outland, and US distributor for Minifigs. The story behind this hiatus can be found on TMP.
Sells the former Les Higgins Napoleonics.
Wargames Supply Dump / WSD
20mm range: World War Two