Bloatware: Microsoft Office Home and Student 2010
Microsoft Office is among the most bloated applications on the planet--starting with its price. The Home and Student edition, which costs $120 for a single-PC license, demands the aforementioned 3GB of hard-drive space and consumes considerable system RAM while running.
Most users would fare better (and certainly more economically) by using one of two alternatives: Kingsoft Office Suite Free 2012 or Google Docs. The former looks and functions very much like Microsoft Office 2003, yet occupies a mere 250MB of your hard drive. It also loads much faster (at least on my system).
If that's still too much space for your computer to commit to a productivity suite, consider shifting your word processing, spreadsheets, and presentations to the cloud. Google Docs requires no space on your PC and won't degrade system performance; it runs entirely in your browser. Google Docs offers a fairly basic feature set, but if that's all you need, you'll appreciate its zero-impact footprint.
Bloatware: Microsoft Outlook
I think we can all agree that Microsoft Outlook is so bloated. (All together: How bloated is it?!) Outlook is so bloated, I can't even see my other programs. It's so bloated, my laptop looks like the Goodyear Blimp. It's so bloated, when Captain Ahab saw it, he threw a harpoon at it. It's so bloated, the feature list on the box says, "See other box."
This information manager/email client is powerful, yes, and popular in many businesses, but it also delivers far more features than the vast majority of users need. And have you seen Outlook's settings menus? They're enough to make even the tech-savviest user cry.
If you just want to send and receive email and manage your contacts and calendar, look no further than Mozilla's Thunderbird. Like Firefox, this fast, mature, stable program lets you trick it out with cool add-ons. And to get it, you don't have to buy Microsoft Office--or spend $140 to buy it as a stand-alone product.
If you use the latest version of iTunes (10.6.1 as of this writing) to manage your music library, you're looking at a 73MB bite out of your hard drive (and that's just for the download), as well as a bunch of Apple extras that can impede performance.