This tutorial explains how to download and install free Xilinx’s ISE Webpack software.
Step 1: Go to Xilinx.com and Sign in to your Xilinx account or create a Xilinx account to download the Xilinx ISE Webpack .

Step 2: Now we have to download ISE Webpack using below link
https://www.xilinx.com/support/download/index.html/content/xilinx/en/downloadNav/vivado-design-tools/archive-ise.html
Under “Version” Select 14.7. Do not select “14.7 (Windows 10)” even if you are using Windows 10

Step 3: Once you get the download page, scroll down below and choose the appropriate installer for your system. You can Choose “Full DVD Single File Download Image” without any selection. By choosing this, it will occupy more storage and increase the downloading time.
For that, I go for “Full Installer for Windows 7/XP/Server ”

Step 4: Once you sign in, go ahead and download the ISE web installer

Observe that ISE is already installed there and ready to go (you may still need to do the licensing process as described in the document ISE Spartan-6 VM for Windows 10 - UG1227 (v14.7), chapter 5). Update to my previous post for this 'Win 10' ISE. Now that I've learnt some more it seems that it's best just to keep the ISE as a build-only engine, just like you guys do already. Because the initial tutorial is all in ISE, I've installed Mojo Loader in Win 10, Mojo IDE in Win 10 and ISE is in the VM as supplied by Xilinx. Unfortunately, Xilinx ISE does not officially support Windows 8 or newer and likely will not due to the shift from ISE to Vivado. Fortunately enough, there’s an easy fix to keep you up and running. The below steps were performed on Windows 10 x64. Open the following directory: C: Xilinx 14.7 ISEDS ISE lib t64. Xilinx Design Suite 14.7 patch for Windows10 32/64. Allows running Xilinx Design Suite version 14.7 under Windows 10 32/64 bit. All ISE Design Tools will be patched by replacing the libPortability.dll with a library that is Win10 compatible libPortabilityNOSH.dll that has SmartHeap disabled. This tutorial explains how to download and install free Xilinx’s ISE Webpack software. Step 1: Go to Xilinx.com and Sign in to your Xilinx account or create a Xilinx account to download the Xilinx ISE Webpack.

Step 5: Once the file is downloaded, you need to extract it. Open the folder and double click on xsetup.exe to start the installation.

Step 6: It will brought to a welcome screen and click next. Accept all license agreements and click next.

Step 7: In Edition list, choose ISE WebPACK option and click next.

Step 8: Make sure that all boxes checked like given below and click Next.

Step 9: Select ISE installation directory and make sure enough space is available on the drive.

Step 10: Final screen summarizes your selection. Click install, now the installer automatically install ISE Webpack tool.

Step 11: It takes some time to install.

Step 12: Once the install is done you should be prompted to get a license. Select Get Free Vivado/ISE Webpack License and click next.
Select Connect now.

Step 13: This will open up your internet browser. After confirming your account details and clicking “Next”, you will see the Xilinx license creator. Check the “ISE WebPACK license” and Click Generate Node-Locked License.

Step 14: Now, it will open the License Generator.

Step 15: Click “Next” to review your request.

Step 16: Click next and the WebPACK should be activated
Now you get the license file from the Xilinx to your registered mail ID. Download the license file (Xilinx.lic) and go back to the Xilinx License configuration manager.
Click on Load license and load the license that you have downloaded.

Finally you will get the License installation successful message. So, now the ISE is ready for working.
Step 17: Driver Installation for EDGE Spartan 6 FPGA kit
https://allaboutfpga.com/edge-spartan6-fpga-development-board-user-manual/#Driver_Installation
Step 18: Follow getting started with ISE design suite tutorial for EDGE Spartan 6 FPGA kit working.
https://allaboutfpga.com/getting-started-with-xilinx-ise-14-7-for-edge-spartan-6-fpga-kit/

Appendix A:
For Windows 10 OS compatibility, following steps required:
1. Navigate to the following ISE install directory: Xilinx14.7ISE_DSISElibnt64
2. Rename the file “libPortability.dll” to “libPortability.dll.orig”.

Xilinx Ise 9.1i software, free download For Windows 10

3. Copy the “libPortabilityNOSH.dll” file to the same folder, and rename it to “libPortability.dll”.
4. Repeat steps 1-3 in the following folder: Xilinx14.7ISE_DScommonlibnt64
The above steps substitute the original “libPortability.dll” with a “libPortability.dll” file that has SmartHeap disabled, the NOSmartHeap (NOSH) version. This does not negatively impact the operation of the tools, and should successfully work around the ISE 14.7 crash documented above.
Now the ISE is ready to work

EDGE Spartan 6 FPGA Development Board

ISE Design Suite: Embedded Edition

The ISE Design Suite: Embedded Edition includes Xilinx Platform Studio (XPS), Software Development Kit (SDK), large repository of plug and play IP including MicroBlaze™ Soft Processor and peripherals, and a complete RTL to bit stream design flow. Embedded Edition provides the fundamental tools, technologies and familiar design flow to achieve optimal design results. These include intelligent clock gating for dynamic power reduction, team design for multi-site design teams, design preservation for timing repeatability, and a partial reconfiguration option for greater system flexibility, size, power, and cost reduction.

ISE Design Suite: System Edition

The ISE Design Suite: System Edition builds on top of the Embedded Edition by adding on System Generator for DSP™. System Generator for DSP is the industry's leading high-level tool for designing high-performance DSP systems using Xilinx programmale devices, providing system modeling and automatic code generation from Simulink® and MATLAB® (The MathWorks, Inc.)

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ISE Design Suite: WebPACK Edition

ISE WebPACK delivers a complete, front-to-back design flow providing instant access to the ISE features and functionality at no cost. To learn more, please visit ISE WebPACK Design Software landing page.

Additional Options

The ISE Design Suite also offers a-la-carte tools to enhance designer productivity and to provide flexible configurations of the Design Suite Editions.

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High-Level Synthesis – Vivado High-Level Synthesis accelerates IP creation by enabling C, C++ and System C specifications to be directly targeted into Xilinx programmable devices without the need to manually create RTL.
Partial Reconfiguration – Xilinx Partial Reconfiguration technology allows designers to change functionality on the fly, eliminating the need to fully reconfigure and re-establish links, dramatically enhancing the flexibility that FPGAs offer.
ChipScope – The ChipScope Pro Serial I/O Toolkit provides a fast, easy, and interactive setup and debug of serial I/O channels in high-speed FPGA designs for use with the WebPACK edition.
Embedded Development Kit – The Embedded Development Kit (EDK) is an integrated development environment for designing embedded processing systems for use with WebPACK edition.
System Generator for DSP – The industry’s leading high-level tool for designing high-performance DSP systems using Xilinx devices for use with the WebPACK edition.