Mentor Graphics HDL Designer 2013.1
HDL Designer combines deep analysis capabilities, advanced creation editors, and complete project and flow management, to deliver a powerful HDL design environment that increases the productivity of individual engineers and teams (local or remote) and enables a repeatable and predictable design process

Here are some key features of - HDL Designer
Manages complex ASIC or FPGA designs in VHDL, Verilog and SystemVerilog.
Accelerates RTL Reuse.
Extensive design checking rules and rulesets
Interactive HDL visualization and creation tools
Automatic documentation features and reporting
Intelligent debug and analysis
Concurrent design entry and checking
Size: 377 MB