EasyInvoicePDF
Free and Open-Source Invoice Generator
About
EasyInvoicePDF is a free and open-source invoice generator.
- No sign-up required & no ads
- Live PDF preview & instant download
- Flexible Tax Support: VAT, GST, Sales Tax, and custom tax formats with automatic calculations
- Customizable invoice templates
- 120+ currencies & multi-language support
- Browser Only: No server uploads, your data stays private
- Mobile-Friendly: Create invoices on the go
- QR Code Support
- Multi-Page PDFs: Seamless multi-page support with automatic pagination
- and many more
Built for freelancers, small businesses, indie builders, and digital nomads who'd rather ship than do admin.
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FounderPlaybooks.
What other founders did to grow.
2722 dispatches from hundreds of founders, pulled from the week's best podcasts.
some tools are just to bring traffic in and channel it to my premium tools
Use Free Tools as Traffic Funnels to Drive Premium Product Conversions
John builds an ecosystem where some of his 26 apps are deliberately non-monetized, designed purely to attract users and route them toward his revenue-generating products. This audience-first architecture means every free tool compounds the reach of paid ones. The result is a self-reinforcing flywheel where audience built in one product becomes revenue in another.
Strava gives you a little badge you can put on your social media whenever you do something well. So we make a lot of our content shareable. A friend started sleeping better and posting Welltory's magical fuel tanks on social media to brag to people — that helps people come back to your app for more content to share.
Bragging rights are an underrated retention driver — make your best moments shareable
Paloni highlights that users sharing app content to social media creates a secondary retention loop: the desire to have more shareable moments brings them back. Welltory makes its animated health visualizations shareable as a deliberate product choice. Strava's route maps and Duolingo's achievement badges serve the same function. The mechanism is self-reinforcing: a user brags, their network sees the brag and downloads the app, and the original user returns to generate more shareable content. This is one of the few organic distribution channels that costs nothing to maintain.
There's a play for whatever you're stuck on.
Read all 2722 playbooks