I would avoid all of the above mentioned products . They're all very, very poorly developed by individuals who can barely work properly.
What, specifically are you looking for Randiv? Something can be put together I'm sure, but you won't get a quality 'free' plugin
Tom Whiting, WHMCS Guru
Linux problems? WHMCS Problems? Give me a shout
Check out my WHMCS Addons
+1 - 866-546-8914 / skype - admin_139201 / twitter/facebook - @whmcsguru