CPU & VHDL           Resources: 3

Tools and Toolkits :

Alliance VLSI design
 http://www-asim.lip6.fr/recherche/alliance/
It's free and runs on most platforms.
It works well (mostly).

Emacs with VHDL support.
Learn to love it.
Do the worksheet on using emacs with VHDL
Learn some of the hot-keys
what does 'C-x C-(' ...... 'C-x C-)' do ?

Altera Quartus II v8.0 & SOPC_Builder
a monster of a tool.