The Data Visualisation Catalogue - Reference tool for data visualisation
The Ultimate Google Sheet Toolkit - We put together a curated list of templates, videos, and tutorials that can help you build your analytics expertise.
Vida - Amazing Visualizations for Your Data
MadKudu for Google Sheets - Get predictions about your target market in GSheets for free
TheoremJS - A Math framework for computation in JavaScript
SyncWith for Google Sheets - Data from any app into Google Sheets, reports & dashboards