Agorism is left-libertarianism.
Roderick Long is left-libertarianism (
http://aaeblog.com/)
There is even free market socialism, called mutualism, in the tradition of Proudhon and Tucker.
What is the problem with calling myself a free market left libertarian?
I don't know exactly what you mean by "left", but to me it means "communism", or "socialism". It is very much incompatible with free market.
So to me, "free market socialism" is an oxymore. I guess I'll have to read about that.
I think I had the discussion in this forum again, but...
Socialism really is not a system. Is a set of promises or desires, but not a set of policies to acomplish those promises (which is very convenient, I know). This promises are equality and having the basic needs covered (food, housing, etc...).
Then there are different systems or proposals to get to those objectives, communism being the most famous, but we all know how it ended. But there are others. In fact, socialist Proudhon was one of the biggest critics of Marx. And developing the ideas of Proudhon, people like Benjamin Tucker or Lysander Spooner would take mutualism to the next level. Now Kevin Karson (which I highly recommend reading) is taking this ideas forward with heavy use of Austrian economics.
This people believe that the free market will bring society as closer as it can get to their ideal of equality. I honestly dont think that peacefully looking for equality is a bad thing. I instinctively dont like to see people having a lot while other people starve. I understand that using the excuse of inequality to gain power and violently impose rules is bad and even against equality itself. But I dont see nothing wrong on working towards a more equal world under free market rules.
I have stopped calling myself a capitalist, because its too loaded, and I wont call myself a socialist for the same reason. I call myself a free marketeer, and since I come from a lefty family I consider myself left-leaning (meaning the core of social values usually related with the left pro-gays, sexually, etc..., but would not like them imposed trough government).
That is why I call myself a free market left-libertarian, or if you want a left leaning free marketeer.