Quip: Team Documents for Slack - Create, share and get notified about Quip docs in Slack
Google Translate - Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.
Trainual + Slack Integration - Capture knowledge or access training right inside Slack
Lingvanex Translator for Slack - Auto-translate messages, documents and images in Slack
WorkStudio - Simple, collaborative work management
Inspector Spacetime from Google - Google Translate for engineers working with motion