FFQueue - FFQueue is a FREE and comprehensive GUI for the FFMpeg command line encoder: Convert audio and video from everything to everything!
PDFCreator - PDFCreator converts every printable document to PDF and many other formats. Create professional PDFs with a few clicks and it's free. With many Professional Features: merge documents, send emails and more.
WinFF - GUI frontend for FFmpeg.
Vector Conversion Tool - Easily convert your Vector files to other formats and back
SoundConverter - The sound conversion application for the GNOME environment.
Foxit PhantomPDF - Edit PDF files with our feature-rich PDF Editor. Download Foxit PDF Editor to convert, sign, scan / OCR & more. A speedy PDF Editor alternative to Adobe Acrobat.