> I just want to know, is there any morphological analysis software
> freely available for English .
In the mid-90s, SIL released PC-KIMMO v2 with an English morphological grammar. It's still freely available, including source code for the PC-KIMMO engine:
http://www.sil.org/pckimmo/v2/pc-kimmo_v2.html I believe, but am not sure, that it covers some derivational morphology as well as inflectional (the latter of course would be pretty trivial).
PC-KIMMO uses two-level rules, i.e. there are no xfst-style "replace" rules. I find two level rules nearly impossible to work with, but your mileage may vary :-).
There is also a web page at ACL entitled "Morphology software for English":
http://www.aclweb.org/aclwiki/index.php?title=Morphology_software although the title seems to be misleading. (And PC-KIMMO is listed as proprietary, which is wrong. OK, I edited it, so it's right now.)