A well-written argumentative essay requires a thorough analysis of the topic with sufficient supporting evidence. However, obtaining information on the topic, summarizing the reading materials, and then presenting them in the form of an argumentative essay can be a challenging task, especially for English as a foreign language (EFL) learners. ProCon.org offers pro and con arguments on over 100 controversial topics. The webpage features a balanced pro/con format that is easy to read and emphasizes the importance of considering both sides of a topic in argumentative writing. Although the website is not intended specifically for writing courses, it is a valuable resource for EFL learners who wish to enhance their argumentative skills and for teachers who wish to incorporate critical thinking into their writing courses. This technology review covers the content of the website and tips for self-study, as well as pedagogical applications.