Buffalo is a fast and scalable production-ready open source project for recommender systems. The implementation is optimized for CPU and SSD. Even so, it shows good performance with GPU accelerator, too. Buffalo, developed by Kakao, has been reliably used in production for various Kakao services. This software is licensed under the Apache 2 license, quoted below.
"Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo" is a grammatically correct sentence in American English, used as an example of how homonyms and homophones can be used to create complicated linguistic constructs. It has been discussed in literature in various forms since 1967, when it appeared in Dmitri Borgmann's Beyond Language: Adventures in Word and Thought. The sentence uses three distinct meanings of the word buffalo: the city of Buffalo, New York; the uncommon verb to buffalo, meaning "to bully or intimidate" or "to baffle"; and the animal itself, buffalo. Paraphrased, the sentence can be parsed to mean, "Bison from Buffalo, which bison from Buffalo bully, themselves bully bison from Buffalo." The sentence is unpunctuated and uses three different readings of the word "buffalo".