Add alternatives

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Author: alexellis

README.md

@@ -169,3 +169,11 @@ spec:
 ## Contributing
 
 Contributions are welcome, see the [CONTRIBUTING.md](CONTRIBUTING.md) guide.
+
+## Similar projects / products and alternatives
+
+* [metallb](https://github.com/danderson/metallb) - open source LoadBalancer for private Kubernetes clusters, no tunnelling.
+* [inlets](https://inlets.dev) - inlets provides an L7 HTTP tunnel for applications through the use of an exit node, it is used by the inlets operator
+* inlets pro - L4 TCP tunnel, which can tunnel any TCP traffic and is on the roadmap for the inlets-operator
+* [Cloudflare Argo](https://www.cloudflare.com/en-gb/products/argo-tunnel/) - paid SaaS product from Cloudflare for Cloudflare customers and domains - K8s integration available through Ingress
+* [ngrok](https://ngrok.com) - a popular tunnelling tool, restarts every 7 hours, limits connections per minute, paid SaaS product with no K8s integration available