autoComplete.js - Simple autocomplete pure vanilla Javascript library.
MailClark - The Slack bot for external communications
React-InstantSearch by Algolia - The easiest way to add lightning-fast search to React apps
PigeonBot - Send emails via Slack with the /email command
Mixpeek - Mixpeek is an API that enhances your app with a search engine that spans all your image, audio, video and PDF files regardless of location.
Clubble.io - Answer emails via Slack.