Security
Unmask parasites, check if a website has been hacked
AuditMyPC, check the security of your PC (not tested)
Firefox
Fasterfox, add-on that can be used to tweak Firefox to run faster
IE Tab, add-on that adds the ability to switch between IE and Firefox rendering
Adblock Plus, ad remover for more peaceful surfing
Wikis
allthewikis, comparison and reviews of wikis
TiddlyWiki, personal wiki, for use on a single computer
wikidot, free wiki, my review
wikidot syntax
Web design
Open source web design
Test your web design in different browsers
Free web layouts
DesignPacks.com, free image collections
Internet security
Vulnerability check
ZoneAlarm, free firewall. Suddenly, without any reason, stopped working, no traffic except pings would get through. Reviews also say it's pretty leaky, so I uninstalled it after using it for years.
PC Tools Firewall Plus, free firewall. Gets good reviews, but I hate it! On my machine it always asks about Workrave, doesn't matter how I configure it. VirtualBox networking doesn't work, no idea how to fix it. And it keeps complaining about Nant and Nunit launching other programs, can't configure that away either.
Comodo Firewall Pro, free firewall. Install was bumpy, first time hang on checking for updates. Second time I skipped the malware scan and it went fine. Set it in clean mode and everything seems to work fine: VirtualBox, NUnit, Nant.
Adeona, open source software to track lost and stolen laptops.
Web standards
W3Schools, online web tutorials
HTML
Handleiding HTML, dutch
HTML Playground, HTML by example
Xenu's Link Sleuth, find broken links on a site, freeware
HTML Kit, freeware HTML editor
Online storage/backup
ADrive, 50GB free storage, max 2GB for a single file
Drop.io, simple private exchange, max 100MB per drop
Dropbox, only shared directories, works really well and is cross-platform (Windows, Mac & Linux)
Spideroak, same as Dropbox, but seemingly safer ('zero-knowledge' storage)
iFolder, automatically share documents across multiple machines
Payment services
Bibit, only for companies with a fair amount of cash
Plimus, for start-ups?
Web hosting
bHosted.nl, I'm trying them now for my own company
Strato, advertises with webshop functionality, haven't tried it yet
Hetzner, cheap dedicated servers
Host Europe, cheap shared servers
netcup.de, very cheap small virtual server
Mailinator, temporary email account, automatically creates account when it receives email
SendEmail, command line utility to send email
Other
Zamzar, free online file conversion
