Here is a collection of what I think is the most essential apps that you might need for Your Mac. This is programs that I myself have tested or is using and therefore is recommending.
Play all video and music in Mac OS X
To Play all formats of music and video files on yoyr Mac you will ned to install this:
VLC for Mac
VLC Media Player is a longtime open-source favorite, and the latest version offers fixes and feature enhancements for the Mac version that make it a must download. It’s not the only option for free video playback, but it’s one of the best, and it’s often the go-to media player for Mac users who can’t seem to play a specific media file.
VLC plays almost all audio and video formats, including MPEG-1, MPEG-2, MPEG-4, DivX, MP3, and OGG, as well as for DVDs and VCDs
Play Windows Media using QuickTime
To watch Windows Media files (WMV and WMA) on your Mac. you might ned to install Flip4Mac. (The free player)
Tips: Install this only if you have a problem playing WMV or WMA files.
Home and download: http://www.telestream.net/flip4mac/overview.htm
Pages is a word processor and a page layout tool that helps you create great-looking documents, newsletters, reports, and more.
They say its a alternativ two Microsoft Office, but I think it´s in many ways better and easyer to use… and its a lot cheaper.
(Free alternative to Microsoft Office)
LibreOffice is a free and open source office suite, developed by The Document Foundation.
The LibreOffice suite includes a word processor, spreadsheet, graphics editor, slideshow creator, database and math formula writer.
CrossOver for Mac
CrossOver and make it possible to install and run many popular Windows applications on your Mac, like Microsoft Visio, Microsoft project and more. Read more about CrossOver here…
Skype is a software application that allows users to make voice calls over the Internet. On Mac you have FaceTime but it only works on Apple products like Mac, iPhone and iPad. Skype is a cross platform application so it works on Mac, Windows, iPhones and Android.
I personally use and recommend Dropbox. But you also have Google Drive and SkyDrive that is good. Which of them you prefer two use is up to you and what is most praktical for you and your needs.
The free image editing program. Used by many open source and linux users. A create start since Leopard doesn’t include any image editing software.