This thread is started as a place to post links to kit manufacturers, kit suppliers, kit cutters, and plans suppliers.
Posting links to aftermarket accessories and parts suppliers will be great too.
It is preferred that links be to the home page instead of to particular kit page, but all links to help the people searching for kits and accessories are welcomed.
I am not sure what to suggest in the case of a particularly bad business that should be avoided. There have been a few of them documented in other threads. Use your best judgement when posting about that issue.
If the thread can be kept on topic it will make it a better resource for those looking for kits and accessories.