PRTG is a network monitoring tool that helps you to ensure that your computer systems are running smoothly and that no outages occur.

Nagios Log Server is centralized log management, monitoring & analysis software. Quickly & easily manage, monitor and analyze log data.

Splunk is a software for searching, monitoring, and analyzing machine-generated big data.

TFTPD32 is a free, opensource IPv6 ready application which includes DHCP, TFTP, DNS, SNTP and Syslog servers as well as a TFTP client.