Well, I use
- Linode (VPS): Host my sites, emails and repositories (Mercurial)
- GetBallPark: Easy invoicing
- BitBucket (and beginning with GitHub)
- Gmail and Google Finance.
Nobody mentions Basecamp, Grooveshark and Instapaper? Really?
The services I use on the web are much more. From the amazing Screenr and Wordpress once every couple of weeks, to Basecamp and Instapaper almost hourly.
Will write a list of these apps sometimes as well. I guess it’s in the drafts or something.