SpecterInsight is a cross-platform, post-exploitation command and control framework based on .NET for red team engagements, threat emulation, and training. Distinguishing features include:

• Rich command output in JSON format
• Data augmentation on individual results
• Tight integration with ELK for data analytics
• Built-in visualizations and dashboards
• Countdown until the next callback
• Easily extendible SpecterScripts
• Integrated obfuscation and payload generation
• Clean and efficient client UI
• Cross platform components

There is also a free, indefinite evaluation license that includes the full product. Most of the SpecterScripts are open source, so it’s a good way to learn. I thought people here might find it useful.