Diaclone.net
This is the best and most extensive Diaclone page on the web. If there is any collector I envy the most, it's certainly him! He has almost every Diaclone toy and variation ever made. 

Amuro-Ray's Train Robo Page
A page dedicated to the Diaclone Train Robos, with tons of pictures. 

Microman

Rescue Base Seattle
A very nice Microman page with lots of Microman related pictures. This is also the page from which I've got the Microman Catalog scans. It also has scans and info about earlier Microman figures.

Microman Forever
A great Microman site with lots of info on all of the different generations of Microman, 
including other toylines related to Microman.

Beetras

Beetras
A Japanese Beetras site by the creator of Diaclone.net.

Macross

The Official Macross Page
The title says it all, this is the official Macross page. It has information and pictures of Macross and all of it's sequels.

The Valkyrie Factory
Even more pictures of Macross / Robotech toys.

Pages about various pre-Transformer toylines

Devvi's Transformer and Diaclone page
Devvi is another dutch Transformer and pre-Transformer collector, who has a nice sellection of pre-Transformers and odd Dutch Transformer variations on his page. 

Robot Japan
Many different Japanese robot toys including some Diaclone and Microman toys.

Other Japanese robot pages

Toybox DX
Another cool page dedicated to al sorts of Japanese toys. It's rather big, so take your time. It's worth it!

Mecha World
Here you find pictures of Godaikins, Shogun Warriors and lots of other interesting Japanese toys.

Cool Japanese Toys
A cool website dedicated to all sorts of Japanese toys, with articles about various Japanese mecha and other toys. It also has a marketplace, where people can buy, sell, trade toys.

Super Dimension Century Orguss Shrine
An excellent page with lots of info about the series and about the mecha from the series. Highly recommended!

Jumboland
This page is dedicated to the Jumbo Machinders. The Jumbo Machinders are 24 inch vinyl toys of the super robots, which wer sold as part of the Chogokin line in Japan and as part of the Shogun Warrior line in the US.

Online stores, dealers

The Robozone
Sells many types of toys including (pre) Transformers and other robot toys.

Transformer links

Jeroen's Transformer Page
My personal Transformer page. It has screen grabs, pictures of unique transformers (including European exclusives), fanart etc.

Rob's Transformer Page
Here you can find the Transformers Toy List and the Transformers Variations List, where you can find the names and variations of practically every Transformer produced.

The Transformers Collector
This page contains many high quality boxscans of Transformers and lots of toy reviews.

Bigbot.com
Lots of Transformer news, plus a very extensive links section on bigbot.net/.

Fred's Transformer variations page
Fred has a growing page detailing all kinds of variations of the Transformer toys. On this page you can also find links to many patent sheets of Transformers and pre-Transformers, which I and several other members of the pre-TF mailinglist helped finding.