Resources

Free online network tools:

1) Central Ops .net - This site is a collection of Internet utilities developed by Hexillion.

2) Network-Tools.com - One of the good site with lots of utilities.

3) IP Checking - Good one for IP checks and geolocation

4) DNS Watch - DNS lookup and performance monitoring

5) Domain To0ls - WHOIS lookup

6) AllWHOIS.COM - Allwhois™, a free service provided by MarkMonitor, is the most complete whois service on the Internet.

7) MXTOOLBOX - MX lookup, RDNS, SPF headers, Blacklist, Port scan and much more..

8.) InToDNS - A light weight, easy DNS and Mail server check website.

9) What is my IP - Check your current IP address.

10) ViewMyIP  - Another simple website with no scripts to check your current IP address.

Operating Systems:

1) Cent OS : Click here to download Cent OS for free

2) Fedora OS : Click here to download Fedora OS for free

3) Ubuntu : Click here to download Ubuntu for free

WordPress:

1) whatwpthemeisthat.com - To check WordPress theme used by the website.