If you're looking for a FindMyTokens alternative, Web3 Antivirus is worth a look. Although its focus is on security, not token recovery, it can assess risks and protect against phishing attacks to help keep your wallet transactions safe. It only works with Ethereum transactions for now, but it plans to add support for other chains later. That means it can be a useful tool for keeping your Web3 activity in order.
Another candidate is DataTrails, which offers a foundation for creating transparent and tamper-evident audit trails. That's more geared toward ensuring digital content authenticity and integrity, but it has features like immutable audit trails and verifiable provenance. That could be useful if you need to keep a record of your transactions in a secure and transparent way.
If you want to understand what's going on with smart contracts and control them, ContractReader is a great tool. It supports multiple networks, with features like syntax highlighting, live on-chain values and in-browser code comparison that can help you scrutinize and manage contract code. That could be useful if you're involved in smart contract development or management and want to understand exactly what they do.