I really the extension of JBoss EL in seam2...
But I wanted to get size of a collection through the following code in Seam 3, it does not work.
Is it provided standalone and I can use it in my application ?
There is not, nor do I know of plans for one, I'm sorry. A fairly simple work around though is to create el functions using facelets. This stackoverflow question has a pretty good answer about how to do that.