the most usual office applications

• Adobe - Acrobat Reader, but a similar software (Preview) comes already with OS X
• Adobe Photoshop - the most popular graphics suite for OS X
• Gimp - the GNU image manipulation program
• LaTeX - a document preparation system, quite a different approach than word etc.
• Microsoft Office 2004 - the most public known office suite for Mac OS X
• NeoOffice/J - a port of OpenOffice to OS X which does not require X11
• OpenOffice.org - the free office suite
• iWork - Apple's very nice office suite - a need for nearly every OSX user