Isara is a Deaf community-center platform that includes an open sign language learning application, an online sign interpreter service, and a crowdsourced, Deaf-friendly video subtitle-making tool. Isara offers fair business model by liberating sign language learning so that everyone can easily – and at no charge – take a sign language course made and maintained by Deaf communities. In return, sign language learners with hearing capability can help Deaf communities by subtitling videos to make online videos deaf-friendly. In an effort to be a sustainable business, Isara also enables its active users to become professional sign interpreters and/or teachers.