Asset Scanning Software

[simpsonj]

I've been using Lansweeper quite happily for the past 5-10 years, primarily for the ability to scan switches and their ports, as well as the deeper scans it can run on servers. However, my renewal from last year has had a price jump of 266%, so I'm looking for a replacement. Can anyone recommend software that can:

 

Scan switches and give information on what is connected to each port

Scan servers and highlight issues, as well as their event logs

Scan desktops and laptops and give information on software installed, last user, serial numbers etc

 

Free or paid, either is worth investigating.