Easy, free educational content creator tool set. Mainly it is possible to create interactive multiple-choice, short-answer, jumbled-sentence, crossword, matching/ordering and gap-filling exercises for the World Wide Web. Hot Potatoes is freeware, and you may use it for any purpose or project you like. It is not open-source. The Java version provides all the features found in the windows version, except: you can't upload to hotpotatoes.net and you can't export a SCORM object from Java Hot Potatoes.
Sadeghi, N., & Soleimani, H. (2015). A description and evaluation of Hot Potatoes web - authoring software in educational settings. Theory and Practice in Language Studies, 5(11), 2407-2415. DOI: 10.17507/tpls.0511.28