UPDATE 2011 January 27th
I haven't really done much lately with Habbo or kept updated with it. This site still pulls in around 520 views per month so I felt I might aswell update for those still viewing. I'll just come right out and say that if you are looking for scripting tools you might aswell just stop looking. Most programs are filled with keyloggers and viruses and you will only end up getting your accounts hacked. If this was 2004 (back when this site was created) I would have a large list of programs to use, tutorials, MOD handbooks and tons of other shit.
Sulake has done a good job with stopping any form of scripting or hacks. I'm sure you can still find some basic scripting programs but they really don't do anything that you're probably looking for. You're really better off just going to the store and paying 10$ to get credits, coins or whatever the fuck they call them now.
This site is still up: www.script-o-matic.net
I don't really keep updated with it or what they do but I'd recommend checking it out. I've removed the navigation and basically everything on the site. I'll update if anything note worthy happens.
UPDATE 2010 VISIT AS THIS SITE IS OLD AND DEAD
www.script-o-matic.net
As I've stated before about a year ago the site has been crap for 2 years so don't email me about how much the site sucks, how much the template sucks, how nothing works etc. This site at one time was great, contained many legit scripting programs and Tutorials and lots of other stuff. I won't update very regularly, maybe once or twice a year because of the traffic.
Habbo scripting is slowly starting to breath again after three years of absence (I wouldn't call it total absence just it's been dead for a long time) Krews.org and many other scripting sites are now GONE, all the programs are now patched etc. There are a few out there that work but don't really do all that much.