KDAN Mobile PDF Reader - PDF Reader is the one app you can rely on when you need a portable solution to work with PDFs.
Quip: Team Documents for Slack - Create, share and get notified about Quip docs in Slack
Pdf.to - Convert PDF to Word, Excel, JPG, & from. Also compress PDF
DocuExpert - AI powered document processing and review software
Jotform - Free Online Form Builder & Form Creator
Trainual + Slack Integration - Capture knowledge or access training right inside Slack