I'm making Windows/.Net based app for managing queues - QueueExplorer. Started with MSMQ support back in 2005, now it supports Azure Service Bus, RabbitMQ and ActiveMQ. It's old fashioned perpetual licensing, so revenue is a rollercoaster. Because of that, it's emotional rollercoaster as well. Good thing is you get paid for full license at the time of purchase instead of collecting it in 10-20 months. Bad thing is ev…
https://venturebeat.com/2021/11/22/conduktor-which-brings-a-...
If anything, it's a testament to what an absolute pain it is to develop on existing message queue/event streaming platforms, so it's clearly a valid niche.