Previously on TMS we have mentioned Field Agent, an App that lets you earn money while out and about.
There is another contender that is worthy of space on your phone though and that is Roamler.
The HQ of Roamler is based in Amsterdam but don't let that put you off. They have plenty of clients...
I have downloaded Roamler and proceeded to sign up all to be met with the typical "not needed" message.
I did a quick search of Roamler in the forums and I had seen some frustration with users offering invites and then never actually partaking in the work given?