Aspose.Cells for Cloud - Aspose.Cells for Cloud is a REST based API for processing spreadsheets in the cloud.
Quip: Team Documents for Slack - Create, share and get notified about Quip docs in Slack
EtherCalc - EtherCalc is a web spreadsheet.
Trainual + Slack Integration - Capture knowledge or access training right inside Slack
SSuite Axcel Professional Spreadsheet - This powerful and professional spreadsheet has all the tools you need to calculate, analyse, summarize, and present your data in numerical reports or colourful graphics.
Papermind - Papermind Slack App is a collaborative article-editing and document management platform for Slack