I have a 430ex that I trigger using a canon infra-red trigger.

If I wanted to use other lights in my setup, how would I trigger them? I can see that if I bought other canon speedlights, the trigger would work but what about other lights (non canon)? When I use my 430ex it has to be in slave mode to work with my current trigger - I'm just wondering about other lights and how I would get them to fire.

Cheers.