Thonny is a new Python IDE for learning and teaching programming that can make program visualization a natural part of the beginners' workflow. Among its prominent features are different ways of stepping through the code, stepby-step expression evaluation, intuitive visualization of the call stack and a mode for explaining the concepts of references and heap. It is free to use and open for extension.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.