Unbury.me
A free, no-signup debt payoff calculator that lets users enter balances, interest rates, and minimum payments to compare snowball and avalanche payoff timelines. It is intended for people who want a quick, single-session calculation rather than an ongoing account-based tool. There is no paid tier or account requirement.
Undebt.it
A web-based debt payoff planner that models snowball, avalanche, and custom payoff strategies across multiple loans and credit cards, tracking progress over time. It suits users who want to compare payoff orderings without committing to a full budgeting suite. The core planner is free to use, with optional paid features for extended tracking and sync.