ETA:
OOPS! I read your post too quickly before answering, and see you want beginner/intermediate workouts.
Many of Cathe's workouts could fit the bill: just use the weight that's right for you.
If you are looking for NON-Cathe workouts, you should post this question in the "Open Discussion" forum, as this section of the forum is just for questions/discussion about Cathe's workouts.
(here's my original post, which I hated to get rid of, and which still may be of some help!):
Many of Cathe's workouts use both dumbells and barbells: the latter especially for lower body work, even when upper body is worked with dumbbells.(Many of Cathe's squats/lunges are done with a barbell, which is often easier to manoeuvre for these exercises.) One I can think of off-hand that uses just dumbells (unless I'm misremembering) is PUB. Maybe the S&H upper body workouts as well?
There are some cardio + weights workouts that use dumbells only for the weight portion, like "Cardio and Weights".
But don't let that dissuade you from picking up other workouts. You can always use dumbells instead of a bar for any move. I know several forum members do that. In fact, some moves (like bench presses) are in some ways better with dumbells (because each side is worked separately, promoting balanced development and recruiting the core a bit more).
HTH