This link is for those who are interesting in entering to asic field.....
The only online asic tool I found free.....
u can search for alliance tool .... or u can use this....
They give complete set of around 12 tools which are useful for understanding of asic flow & design....
However I have problem in installing some of the tools....they give error in linux like.....
-lx11 libraries not found..if someone can help or resolve this prblem with this tool...It will be agrt help