Crowdin - Localize your product in a seamless way
Deaf Alphabet - Convert plain text into sign language
POEditor - The translation and localization management platform that's easy to use *and* affordable!
Transcense - Converse w/ the deaf, w/o sign language (pre-launch)
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.
Uber Sign Language - Start a conversation in American Sign Language.