- ReactRight: Web app that provides instant compatibility and reactivity information for over 17,000 common chemicals.

- Chemwatch: App available for iOS and Android that offers access to a vast database of chemical safety information, including compatibility.

- HazMat Pocket Reference: Android app focused on emergency response and includes a chemical compatibility module.

- Merck Chemicals Compatibility App: iOS app with a list of over 1 million compatible and incompatible chemical pairs.

- Chemical Compatibility Companion: Web-based tool from the National Institute of Standards and Technology (NIST).

- ChemAssistant: iOS app with safety profiles, handling guides, and compatibility charts for various chemicals.

- ChemID by Sigma-Aldrich: Android app that helps identify unknown substances and provides safety and compatibility data.

- Cameo Chemicals: iOS and Android app with detailed chemical profiles and compatibility information for over 5 million substances.

- CHEMSAFE: Web-based tool that includes chemical compatibility, toxicity, and emergency response data.

- CCCheck – The Chemical Compatibility App: iOS and Android app with a comprehensive database of over 18,000 chemical pairs and compatibility ratings.

These apps and tools provide valuable information about chemical reactivity, compatibility, and safety measures, helping users make informed decisions when handling and mixing chemicals.