Try the free-to-download Living Forgotten Realms adventures. They're all delves (typically three fights and a skill challenge), designed to run in four hours.
Try the free-to-download Living Forgotten Realms adventures. They're all delves (typically three fights and a skill challenge), designed to run in four hours.
Dungeon magazine has a lot of short adventures. You would have to sign up to DDI for a month, but you can download all of them. There are something like 100 adventures. Most of them are 3-5 encounters long.