This engine has been used in a number of translations, such as the English versions of Narcissu and Tsukihime.
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Due to its simplicity and its liberal license (while it is not open source, royalty-free commercial use is permitted), it quickly became popular in Japan, and was used for a number of high-profile commercial and dōjin titles, such as HaniHani and Tsukihime.
As years went by, it was succeeded by software like KiriKiri, Nscripter and Ren'Py.