Checkout this slide show of 101 best web freebies on Business Week.
My favourite web freebies that find a place in the slideshow are as follows. (And they are all Open Source!):
Ubuntu - Have a new PC? Now you need an operating system, and that can run up to an additional $278 for Microsoft’s Vista operating system or up to $200 for Apple’s Leopard. The Linux-based Ubuntu operating system is free and comes with a word processor, spreadsheet, presentation software, browser, e-mail, media player, and photo-editing software.
OpenOffice - The basic version of Microsoft’s popular Office suite runs as high as $400. There’s no charge for OpenOffice.org, and it’s available for Windows, Mac, and Linux.
Gimp - Adobe Photoshop is a powerful graphics program, but with a $999 price tag, few can afford it. Open-source download GNU Image Manipulation Program (GIMP) performs many of the same image editing and retouching tasks for free.
and of course,
WordPress!! - One of the first free blog hosting sites, WordPress offers features like user registration, spam protection, and a wide variety of designs.
I use all of the above freebies and recommend them to anyone who is heading for a paid option. Already evangelised quite a few victims. That said, I do wish to own a Mac some day 
.
PS: All links open into new windows/tabs.
Get me the paid versions of the freebies you mentioned there and I’ll buy u a Mac
Why pirate when they are available for free?
Who asked to Pirate? U buy me the legit stuff and I’ll buy u a Mac. That was moi deal!
havent used ubuntu. am still on fedora core 5.
also use free AVG Anti virus & skype. I do read up books on MIT’s free courseware and sometimes try to read up a few french words on BBC’s language website.
@Liju: You use AVG for your Fedora?
I use AVG on windows on my home pc.
I use clam antivirus for fedora.
GIMP seems to be interesting. I will try to download it asap. I am planning to learn adobe photoshop, but will try GIMP.
Yo! Try getting some free open source stuff that can run on Macs.