Remote Mac monitoring:
One of iStat's main attractions is it's ability to remotely monitor one or more Apple Mac computers, allowing server admins and other Mac users to keep an eye on what their computer is doing from afar. iStat monitors CPU, memory, disks, temperatures, fans, uptime and load averages, right from your iPhone. iStat Server is required for remote monitoring. iStat Server requires Mac OS X 10.4 or greater and is available as a free download from bjango.
iStat can use either Bonjour or TCP/IP to connect to iStat Server. Bonjour is great for zero-config situations where you're on the same network. TCP/IP (either via hostname or IP address) is ideal for all other cases. iStat can connect to any number of Macs running iStat Server.
iStat lets you see your iPhone's stats for memory, disk space, WiFi and Cell IP addresses, uptime & load averages, plus view and email your iPhone's Unique ID and MAC address. A "Free Memory" function is also included, which attempts to free up memory for use by third party applications.
iStat can also be used to ping server, to see if it's up and running, or trace the path taken to a server (traceroute). iStat's ping and traceroute store a history of the 10 most recently used hostnames or IP addresses. iStat's traceroute resolves hostnames, making it one of the few iPhone apps available with that ability. But best of all, they're well designed and easy to read. They look like they belong on your iPhone.