Something worth checking out (partly because the cost of checking is so low) is simply the "new" section here on HN. I find a lot in there in the areas you're

Something worth checking out (partly because the cost of checking is so low) is simply the "new" section here on HN. I find a lot in there in the areas you're looking for that the general populace here doesn't vote up. At a minimum, it's similar to the front-page but it moves faster (so you don't have to see the "pong written in go" type posts more than once)