Take an IP and try to look for the domain/host associated with it.
Get all possible details about an SSL certificate.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Use the Google translator API to generate text to speech audio.
Get the size of a text in bytes (B), Kilobytes (KB) or Megabytes (MB).
Convert forum type bbcode snippets to raw HTML code.