The leader is still Subclipse. Runner-up is Subversive. Being a credible alternative when it was released, mildly insulting words were exchanged; the Subversive team even suggested that cooperation was in order (which was mostly rejected by the Subclipse team). This culminated with 2 competing proposals (one for Subclipse, one for Subversive) being made to the Eclipse foundation.
That was about 6 months ago. Today, I am not clear who the winner is. The proposal for Subversive states that it has been approved (though I thought that the Eclipse team usually did not give formal approbation). But development goes on furiously for both teams (both released Eclipse 3.2-compatible versions in early February 2007).
As for me, being behind a very annoying firewall, I cannot use the update feature from Eclipse to get Subclipse. So I am giving Subversive a shot.
Somehow, this all sounds like a storm in a tea cup, doesn’t it?