Use LAIR -- https://github.com/lair-framework/lair -- from FishNet Security
There is a drone component for nmap -- https://github.com/fishnetsecurity/Lair-Drones -- which allows ease of import from either Nmap XML or Nmap grep files.
You can view even NSE script output in the LAIR web front-end by clicking into your project, then Hosts, then select the specific host by IP address, and finally by accessing the Notes tab.
LAIR is extremely powerful when compared to other vulnerability and credential pen-test data aggregation platforms. There are a series of browser scripts (think bookmarklets) -- https://github.com/lair-framework/browser-scripts -- that can modify your data in order to make it more visually-appealing, more efficient, more accurate, and provide focus. More information on the browser scripts as well as Burp Suite Extension integration to create a LAIR tooltip seen here -- https://www.fishnetsecurity.com/6labs/blog/updates-lair-ecosystem
I believe that you will like the UI, especially if you leverage the other drones. I was able to find drones for blacksheepwall, burp, cookiescan, dirb, msf, nessus, nexpose, nikto, and tshark in addition to nmap. The MetaSploit Framework is my favorite because it supports both import and export capabilities, with the ability to limit network or host scope. Similarly, the drone-shark one can apply a BPF filter.
The setup for LAIR was very straightforward. I was up and running for the first time within 10 minutes and can replicate a new environment in less than 5 minutes. It uses the secure-by-default paradigm where every network connection defaults to TLS, even when an underlying protocol (e.g., MongoDB) does not support it. In fact, it goes beyond just setting up the connectivity with stunnel but provides you with client configurations as well. Even the administrative web portal must consist of an email address and a strongly-checked password.
The interface is snappy and does not feel clunky like many other FOSS security tools. If you don't like it, then please vote down my answer. Everyone please just vote this down. The less people know about LAIR, the better my penetration testing teams will be and the worse yours will be. I use LAIR to great effect when sharing testing data with others, but also when organizing my test data when running solo.