Email Header Parse - Check the route an email took, including servers, hops and delays.

SMTP Checker - Check the connectivity of an SMTP server. Test commands on SMTP and local domains

POP Password Checker - Test the connectivity of a POP server. Test username and password for account, list mailbox size and quantity.

IMAP Password Checker - Test the connectivity of an IMAP server. Test username and password for account.

POP Box Purge - Purge all email in a POP mailbox. Warning: Cannot be undone!

DNSBL Check - Check for an IP on popular DNS email blacklists.

Dig - Check the DNS records of a domain.

Host - Run host command on a domain/ip to find A/MX records etc

NSLookup - Similar to host

rDNS - Check the rDNS (PTR) record for an IP.

Whois - Check a whois record for a domain.

Port Check - Check for open ports on your IP.

HTTP Header Sniff - Sniff the returned headers from a web server.

HTTP Who Are You? - Discover what your information is viewable from your browser over the internet.

FTP Checker - Test the connectivity of a FTP server. Test username and password for account.

DAP-Scrob - Upload play logs from Rockbox/iPod to Last.fm.

Subnet/IP Calc - Calculate subnet masks and ranges with this simple calc.

File Diff - Diff's 2 files.

Rand Pass - Generates a random password.

Rand - Generates a random number between X and Y

Download Time Calc - Bytes --> Time - Quickly calculate how long it will take to download a file on a connection speed.

Download Bytes Calc - Time --> Bytes - Quickly calculate how much data can be downloaded on a connection speed.

Download Speed Calc - Time + Bytes --> Speed - Quickly calculate the throughput speed dependant on time vs bytes.

World Clock - See the current time across the world

Aspect Ratio Calculato - Calculate aspect ratio with this simple calc.