cacti + nagios
I can recommend "Network Monitor" 10-Strike Network Monitor - a Network Monitoring Program (for Windows)
I'm new to this forum as I'm also trying to find the right server monitoring software for my requirements. Ideally I'd like a really good free one too, but so far I've just found paid-for ones. Is £10 a month a reasonable price for one which says it's really good? I just don't know what kind of price is good!
But in my opinion if you decide to buy something it is better to pay once but not every month, and get updates and help from developers for free.
Your advice regarding unlimited checks is useful, thanks.
I Googled and came across one called Cyclops (Cyclops Server Monitoring Software | SMS Uptime, Downtime & Outage Alerts | Monitor Servers, Web Applicatons, Websites & Network Devices | Local Software) which says it offers unlimited checks for £99 per year. Sounds pretty good! But they seem a new company.
I'll sign up for their free trial and see what it's like.
I'm using ServerAssist, not the cheapest solution out there, however is very good and has http connectivity back to monitoring console so can have a single console for all your sites, but sould still fun a local console at each site for their servers too. The team at server assist are really good and take feedback onboard well, I've had features arrive in newer versions after a small wouldn't it be nice if... conversation.Server Monitoring and Network Monitoring for Windows, Linux, applications and SNMP
Thanks Skr, a software provider who listens to feedback and makes quick updates to the software to keep users happy sounds great - I'll check them out!