Eugene Roshal (Евгений Лазаревич Рошал, Yevgenii Lazarevich Roshal) is a Russian software engineer best known as developer of:
The RAR compression algorithm is officially owned by his elder brother Alexander, because Eugene Roshal has "no time to concern himself with software development and copyright-related issues at the same time."
Biography and product timeline based on The Compression Project web page: Russian language interview with E. Roshal accessed 12 January 2010 (and verified by personal email exchange with him in 2011).