The Dude - MikroTik is a Latvian company which was founded in 1996 to develop routers and wireless ISP systems. MikroTik now provides hardware and software for Internet connectivity in most of the countries around the world.
Cloudlytics - Analyze Your Amazon S3 & CloudFront Logs.
Pandora FMS - Pandora FMS: Opensource monitoring software
S3stat - S3stat is a service that takes the detailed server access logs provided by Amazon's CloudFront and Simple Storage Service (S3), and translates them into human readable statistics, reports and graphs.
cStatus - Monitor and scan a network.
Checkmk - Checkmk - the software for effective IT monitoring