Hi,
There is a -really- great replacement for the Java Applet SketchEl (WIMSchem)
See http://scitouch.net/opensource/ketcher
The -only- problem with it is was, it did (checked 11-2013) not support the addition of template molecules.(at least not in MDLmolfile format )
Apart from this, it was amazingly fast and full of possibilities !
Joke