docs: add prominent sponsorship options

- Add sponsor banner at top of README
- Add Revolut and Open Collective to FUNDING.yml
- Add dedicated sponsor page in docs
- Add sponsor heart link in footer

Author: benoitc

.github/FUNDING.yml

@@ -1 +1,3 @@
 github: [benoitc]
+open_collective: gunicorn
+custom: ["https://checkout.revolut.com/pay/c934e028-3a71-44eb-b99c-491342df2044"]

README.md

@@ -1,5 +1,12 @@
 # Gunicorn
 
+<p align="center">
+  <strong>Gunicorn is maintained by volunteers. If it powers your production, please consider supporting us:</strong><br>
+  <a href="https://github.com/sponsors/benoitc"><img src="https://img.shields.io/badge/GitHub_Sponsors-❤-ea4aaa?style=for-the-badge&logo=github" alt="GitHub Sponsors"></a>
+  <a href="https://opencollective.com/gunicorn"><img src="https://img.shields.io/badge/Open_Collective-Support-7FADF2?style=for-the-badge&logo=opencollective" alt="Open Collective"></a>
+  <a href="https://checkout.revolut.com/pay/c934e028-3a71-44eb-b99c-491342df2044"><img src="https://img.shields.io/badge/Revolut-Donate-191c20?style=for-the-badge" alt="Revolut"></a>
+</p>
+
 [![PyPI version](https://img.shields.io/pypi/v/gunicorn.svg?style=flat)](https://pypi.python.org/pypi/gunicorn)
 [![Supported Python versions](https://img.shields.io/pypi/pyversions/gunicorn.svg)](https://pypi.python.org/pypi/gunicorn)
 [![Build Status](https://github.com/benoitc/gunicorn/actions/workflows/tox.yml/badge.svg)](https://github.com/benoitc/gunicorn/actions/workflows/tox.yml)

docs/content/sponsor.md

@@ -0,0 +1,47 @@
+# Support Gunicorn
+
+Gunicorn has been serving Python web applications since 2010. It's downloaded millions of times per month and runs in production at companies of all sizes.
+
+**This project is maintained entirely by volunteers.** Your support helps ensure continued development, security updates, and compatibility with new Python versions.
+
+## Why Sponsor?
+
+- **Security**: Rapid response to vulnerabilities
+- **Reliability**: Bug fixes and stability improvements
+- **Compatibility**: Support for new Python versions and frameworks
+- **Features**: Continued development of ASGI, HTTP/2, and more
+- **Documentation**: Keeping guides and references up to date
+
+## How to Support
+
+### Donate
+
+<p>
+  <a href="https://github.com/sponsors/benoitc"><img src="https://img.shields.io/badge/GitHub_Sponsors-❤-ea4aaa?style=for-the-badge&logo=github" alt="GitHub Sponsors"></a>
+  <a href="https://opencollective.com/gunicorn"><img src="https://img.shields.io/badge/Open_Collective-Support-7FADF2?style=for-the-badge&logo=opencollective" alt="Open Collective"></a>
+  <a href="https://checkout.revolut.com/pay/c934e028-3a71-44eb-b99c-491342df2044"><img src="https://img.shields.io/badge/Revolut-Donate-191c20?style=for-the-badge" alt="Revolut"></a>
+</p>
+
+- **[GitHub Sponsors](https://github.com/sponsors/benoitc)** - Monthly or one-time donations
+- **[Open Collective](https://opencollective.com/gunicorn)** - Transparent finances, tax-deductible in some regions
+- **[Revolut](https://checkout.revolut.com/pay/c934e028-3a71-44eb-b99c-491342df2044)** - Direct donations (individuals and companies)
+
+### Corporate Sponsorship
+
+If gunicorn is part of your infrastructure, consider:
+
+- **Recurring sponsorship** through [GitHub Sponsors](https://github.com/sponsors/benoitc) or [Open Collective](https://opencollective.com/gunicorn)
+- **Sponsored support contracts** for priority bug fixes and feature requests
+- **Logo placement** on our website and README for sponsors
+
+For corporate inquiries: [benoitc@enki-multimedia.eu](mailto:benoitc@enki-multimedia.eu)
+
+## Sponsors
+
+Thank you to all our sponsors and contributors who make gunicorn possible!
+
+<!-- Sponsor logos will be added here -->
+
+---
+
+*Every contribution, no matter the size, helps keep gunicorn running. Thank you!*

mkdocs.yml

@@ -26,6 +26,7 @@ nav:
   - Community:
       - Overview: community.md
       - FAQ: faq.md
+      - Support Us: sponsor.md
   - Reference:
       - Settings: reference/settings.md
   - News:
@@ -132,3 +133,5 @@ extra:
       link: https://github.com/benoitc/gunicorn
     - icon: fontawesome/brands/python
       link: https://pypi.org/project/gunicorn/
+    - icon: fontawesome/solid/heart
+      link: https://github.com/sponsors/benoitc