UProc for Sheets - Boost your sales, marketing and IT tasks from Google Sheets
Conduit - Your data-driven AI chief of staff
Sheetlist - Discover free Google Sheets for marketing, finance and more
QuotaPath - Calculate commission and quota attainment easily, for free
Mattermark in Salesforce AppExchange - Automatically enrich leads in Salesforce with Mattermark
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.