UProc for Sheets - Boost your sales, marketing and IT tasks from Google Sheets
Sales List by Prospect.io - A curated list of tools & resources for salespeople
Sheetlist - Discover free Google Sheets for marketing, finance and more
Bumpsale - Sell your awesome digital product using incremental pricing
Mattermark in Salesforce AppExchange - Automatically enrich leads in Salesforce with Mattermark
Mailshake Omni - Sales engagement software for modern sales teams