I've just released a new version of HDLmaker. I've added support for the Xilinx 6.1 tools including project generation and I've added a comment feature to the .pin files which allows you to add comments to ports.
Example,
In the .pin file IB_STAT_RX_LINK_ELP type = out,comment = "End of Link Packet";
Generated Verilog //-- End of Link Packet output IB_STAT_RX_LINK_ELP;
HDLmaker generates hierarchical Verilog and VHDL as well as scripts and constraint files for all of the better know simulators, synthesis tools and FPGA tool sets.
You can get HDLmaker from,
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It's free with a BSD style license.