Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Quarterly Tax Calculator Bot - Quarterly tax calculation for freelancers
Sheety - Turn any Google sheet into an API instantly, for free. Power websites, apps, or whatever you like, all from a spreadsheet. Changes to your spreadsheet update your API in realtime. Neat
Social Media Pricing Calculator - Planable, along with pricing experts from Soft Fight, built the pricing calculator that agencies & freelancers need.
Sheetsu - Turn Google Spreadsheet into API
Stripe Atlas Taxes - Help file your business taxes