From what I have read, Tiger Barbs are compatible with most comunity fish, I have mine with Danios, Cories, a Clown Pleco and a Rainbow Shark and a Gold Gourami. Tigers are best kept in a group of at least 5 or 6. If they are kept in smaller groups they tend to pick on their tank mates. When they are kept in a group they mostly just pick on each other

They are active fish and like to chase each other which is why they need friends, and they are definitely a lot of fun to watch

. They are also known to be fin nippers so they should probably not be kept with anything with long flowing fins, like Fancy Guppies.
Just as a warning on the Gold Gourami; many people say that as they get older they get more aggressive, mine gets along great with his tank mates but some people have reported that they can be mean.
What size tank do you have? That would help determine what fish would go well with the Tigers.
Hope that helps,
MTH