Easily convert PNG image files to JPG.
Easily convert PNG image files to BMP.
Easily convert PNG image files to GIF.
Easily convert PNG image files to ICO.
Convert a number to written, spelled out words.
Get all the HTTP headers that an URL returns for a typical GET request.
Check if the URL is cached or not by Google.
Get details of any file type, such as the mime type or last edit date.
Get the gravatar.com globally recognized avatar for any email.
Make sure your passwords are good enough.