VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Online Convert - Convert files like images, video, documents, audio and more to other formats with this free and fast online converter.
foobar2000 - An advanced freeware audio player for the Windows platform.
Zamzar - Free conversion online of many type of documents (images, text, video, audio...
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.
online2pdf - This Online PDF Converter can convert all your files to PDF but also compress and merge PDF files! Word, Excel, PowerPoint, images and any other kind of document can be easily converted to PDF on Online2PDF.