Any of the popular standalone chatbots can be a good tool for brainstorming keywords to search for a research topic. Many of the literature search tools linked on this guide also show conceptual keywords that can help with developing search terms.
Web interface for the R package litsearchr, helps identify search terms and generate reproducible search strategies. The web version and the R package are both completely free.
A tool with a free tier for collaborative organizing and managing evidence synthesis reviews. Includes an AI engine that rates how likely screening items are to be included in your review based on your inclusion/exclusion criteria. Does not do the screening for you, but allows you to sort the most likely inclusions earlier in your screening process.
Free and open source tool that uses active learning as you screen to resort the remaining items by most to least likely to be included in your review. Like Rayyan, it doesn't do the screening for you. It sorts items to screen based on your previous inclusion/exclusion decisions.
