Zamzar is a free online file format converter. Here is a list of what it can do:

Videos:
3gp - 3GPP Multimedia File
aac - Advanced Audio Coding File
ac3 - AC3 Audio File
au - AU Audio File
avi - Windows video file
flac - Free Lossless Audio Codec
flv - Flash Video
gif - Graphic Interchange Format
mmf - Synthetic Music Mobile Application Format
mov - Apple QuickTime Movie
mp3 - Compressed audio file
mp4 - MPEG-4 Video File
ogg - Ogg Vorbis Compressed Audio File
wav - Windows audio file

Music:
aac - Advanced Audio Coding File
ac3 - AC3 Audio File
au - AU Audio File
mp3 - Compressed audio file
m4a - Compressed video file
ogg - Ogg Vorbis Compressed Audio File
wav - Windows audio file

Image:
bmp - Windows bitmap
gif - Compuserve graphics interchange
jpg - JPEG compliant image
pdf - Adobe document
ps - Postscript document
thumbnail - Thumbnail image
tiff - Tagged image file format

Document files:
csv - Comma Separated Values
html - Hypertext Markup Language
mdb - Microsoft Access Database
ods - OpenDocument spreadsheet
pcx - Graphics format
pdf - Portable Document Format
ps - Postscript document
rtf - Rich text format
xml - Extensible Markup Language

Ajax Server Monitor use Ajax, PHP and the PHP-JSON extension to stream the server data to the user. This can be a great tool to check the server load, great for debugging.

Editor Comment:

It uses not just Ajax, but COMET, impressive. :plz: