Google Sheets + MonkeyLearn - Power up your Google Sheets with text analysis
UProc for Sheets - Boost your sales, marketing and IT tasks from Google Sheets
Sheetlist - Discover free Google Sheets for marketing, finance and more
Flookup - Fuzzy lookup, highlight and remove duplicates from your datasets
Mattermark in Salesforce AppExchange - Automatically enrich leads in Salesforce with Mattermark
Indico - Machine learning without the PhD