I never got a chance to post a link to a great post by
Méprisant last month on some of the
best portable apps available right now. Most of them are free, and the list spans several categories, although most of them are not U3-enabled.
There are some great suggestions in that list, and I have picked up a few applications I haven't tried before. I do disagree on one point - when introducing a security category Méprisant noted:
Antivirus and Spyware : NOTE : I personally think don't think this category should exist. The entire point of using portable software is to perform certain tasks on machines that do not have the software to perform these tasks, like in an internet cafe. If I wanted to disinfect an infected machine, I would run either an online virus scanner or boot the machine from antivirus software cd.
Unfortunately, using a compromised computer is not a good idea! In the past I had a special USB flash drive with a Read Only switch that enabled me to plug into any computer without worrying that my drive will be compromised by spyware or viruses resident on that computer. Unfortunately, this seriously limits what you can do with your drive so having spyware and virus protection is the next best thing. You don't want to spread disease with your flash drive, always use protection! :)
Another reason for having security software on your drive is rescuing computers that are often not easily fixed. Think of your mom's computer, you happen to be there one evening and hear of all the problems she is having. It takes almost no time to plug in your drive with up-to-date virus/spyware definitions and clean it - even if the network access on the computer has been disabled by the virus. I love that about portable security!