VHDLLab 6.0.170.4 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. VHDLLab is included in Education Tools. This free software was originally developed by Miro Bezjak. We recommend checking the downloaded files with any free antivirus. The most popular versions of the VHDLLab are 6.0 and 2.6.
From the developer:
VHDLLab is an educational program designed for modeling and simulation of digital circuits. The program can create digital circuits by writing VHDL source code, drawing schemes or drawing automatons. VHDLLab consists of server and client application communicating by Spring HTTP Invoker over HTTPS.
You may want to check out more software, such as TestKing Q and A - ECCOUNCIL 312-50, BWMed PocketPC and Smartphone by Skyscape or TestKing Q and A - Microsoft 70-642, which might be related to VHDLLab.