-
For example, PHP provides a builtin testing server; I think python has one too, and there are various options for nodejs, e.g. live-server.
-
InfluxDB
Purpose built for real-time analytics at any scale. InfluxDB Platform is powered by columnar analytics, optimized for cost-efficient storage, and built with open data standards.
-
Nodemon.io
Monitor for any changes in your node.js application and automatically restart the server - perfect for development
That's the question you asked, but if you want a web server that will serve your local content, I like https://www.npmjs.com/package/nodemon. That assumes nodejs though, which you gave literally zero details as to what you are actually trying to do so I'm just guessing.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.