Not sure what you need, but Xilinx Design Tools
could be a start. Xilinx states that ISE works with Win and RHLE, though it apparently run ok in Slack 12 through Wine (didn't tried to run the RHLE in Slack).
Or try Altera at http://www.altera.com/products/software/sfw-index.jsp
There are boards and kits with the HW built and ready for testing and programming.
you find many user built cores for common needs, or take a look at the VHDL-Cookbook.pdf