BOMnipotent
Downloads
BOMnipotent Server and Client can be downloaded here. Using the server requires a subscription for most actions, the client is free for everyone.
Pricing
BOMnipotent has one subscription-tier for all, which costs as little as ordering a pizza twice a month.
Documentation
Insctructions on how to install, configure and use both BOMnipotent Server and Client are found on the separate website doc.bomnipotent.de .
The source code to these pages is available on GitHub . There you can also create an issue if you encounter any problem with either the documentation or the program itself.