Shmeppy isn’t dead. I still work on it every day and I make releases not-too-infrequently.
Here’s a thread on the dice rolling feature: Feature Request: Dice Roller. I do suspect it will come to Shmeppy eventually (unlike what I said in that thread a couple years ago), but it’s still a low priority feature.
This might be an interesting thread about which dice rolling programs other people are using.