Which Remote research tool should I use?

Which remote research tool should I use?

I saw today this potentially handy UX research tool diagram outlining online options for user experience testing and development. There are a maze of new options based on project variables, some of which I’m researching now for a site redesign.

The diagram above was created recently by UX intern Shannon Butler at Clearleft Ltd in Brighton, UK.

Related readings: http://www.delicious.com/mburpee/ux