Indeed this range has grown wild. Without aiming to be exhaustive (I'm certainly missing some interesting proposals lost in the abyss of bitcointalk.org), we can mention the following use-cases: multi-party stateful contracts [11], congestion trees [12], payment pools [13], "eltoo" layered commitments [14], programmable vaults [15], multi-events contracts [16], blockchain-as-oracle bets [17], spacechains [18], trustless collateral lending [19], ...