Question: I need a tool that can simulate Ethereum transactions to identify potential risks before I sign them.

If you're looking for a tool to simulate Ethereum transactions and assess potential risks before you sign them, Web3 Antivirus is a good option. This free, open-source browser extension provides a broad layer of protection by blocking malicious transactions and website interactions with phishing sites. It also includes transaction simulation, a sophisticated risk assessment that covers more than 60 risks, and phishing protection that blocks website interactions. It currently supports Ethereum transactions but will expand to other chains. It's available as a browser extension for Chrome, Edge and Firefox, and as a MetaMask Snap integration.

Another option you might want to consider is Pipedream. Although it's not geared specifically for transaction simulation, Pipedream is an environment where developers can create complex applications with low-level code control and no-code interfaces. It offers instant deployment and access to more than 2,100 APIs, making it useful for integrating with a wide range of services. Although its primary purpose is to create applications, it can also serve as a powerful foundation for creating custom logic to process Ethereum transactions and the risks that go along with them.

If you're more of a developer, you might like Webstudio. This website builder has a drag-and-drop interface to create mobile-friendly blockchain projects, including integration with Ethereum smart contracts. It's good for web3 projects like NFT minting sites and blockchain-based blogs. It doesn't offer transaction simulation, but its smart contract integration and wallet-based user authentication abilities make it a good foundation for building web3 apps.