[bitwalker]

In my opinion they are two words for the same thing: Someone who builds software.

The word programmer refers to the literal act of writing the code, while to me the word developer implies writing the code, but also all the other "software engineering" aspects of developing software. If you wanted to be technical, you could say a programmer just codes, while a developer codes but also determines requirements, develops a specification/scope, etc.

I refer to myself with both interchangeably, and I assume most others do as well. I really don't consider them to be different in any meaningful way.