For example, in Javascript: "Hello" + " " + "World!". What the operator there is doing is concatenating the strings, so if you had a method to do it you wouldn't call it add - you'd call it concat.
In ruby you can implement certain numerical methods including +
In smalltalk + is a binary method, you can give your methods all sort of symbol names. Same with Scala I think.
Hmm, are we talking about (user defined) operator overloading as a language feature, or about overloaded operators? For example, I hate that 1/2 and 1.0/2 are different things in most languages, but I haven't heard anyone call this operator overloading in the context of C.
