Topweaver SoC integration tool

I would like to recommend the Topweaver, very powerful SoC integration tool.
Feature

• Full mixed bidirectional Verilog and VHDL support
• Automatically instantiate cell modules or entities
• Full function dynamic graphic user interface
• Automatic port connection driven by Smart Link technology
• User defined naming rules for instance and wire
• Bus combination and inout construction
• Generate Verilog/VHDL connection module automatically
• Visually adjustment of HDL code format
• Output formatted file list
• Generate test fixture by Verilog and VHDL
• And more...

http://www.topweaver.com/screen.html