Hey all,
I'd like to announce a new hobbiest-focused cloud platform for device communication over WiFi: https://ubsub.io.
UbSub is a Publish-Subscribe platform (much like Amazon SNS/SQS, if you're familiar), but focused on a much smaller use-case, making it significantly simpler to use. It's not completely focused on IoT, so it's very easy to integrate with other platforms such as IFTTT.
Key features:
- HTTPS-based trigger/webhook driven
- Other trigger/hooks such as: Email, device notifications, raw UDP
- Retryable delivery (with exponential backoff)
- Payload manipulation via javascript VM
I've also taken the care to write a C++ implementation that communicates securely over UDP. It features:
- Bi-directional communication (Events and listeners)
- NAT traversal via holepunching
- Encrypted payload (salsa20) with HMACSha256 signature for secure communication
- Automatic (optional) JSON payload wrapping / extraction
- Automatic renewals/re-subscribe and retrying
- ACK support for guaranteed delivery (with timeouts)
I've tested it on a Particle Photon and NodeMCU.
You can find the general docs here: https://p.ubsub.io/docs/
The IoT C++ library is here (Compatible with ESP8266/32, and Photon): GitHub - ubsub/ubsub-iot: C++ Implementation of UbSub protocol for IoT devices
I'd love to know your honest feedback. I personally use it for my own IoT (home-control), but I'm probably biased 
Regards,
~ Chris (zix99)