# Information about third-party source components for Backup gateway
<a name="bgw-third-party-source"></a>

In this section, you can find information about third party tools and licenses that we depend on to deliver Backup gateway functionality.

The source code for certain third-party source software components that are included with the Backup gateway software is available for download at the following locations:
+ For gateways deployed on VMware ESXi, download [ sources.tgz](https://s3.amazonaws.com/aws-storage-gateway-terms/bgw_backup_vm/third-party-sources.tgz).

This product includes software developed by the OpenSSL project for use in the OpenSSL Toolkit ([https://www.openssl.org/](https://www.openssl.org/)).

This product includes software developed by VMware® vSphere Software Development Kit ([https://www.vmware.com](https://www.vmware.com)).

For the relevant licenses for all dependent third-party tools, see [Third-Party Licenses](https://s3.amazonaws.com/aws-storage-gateway-terms/bgw_backup_vm/third-party-licenses.txt).

## Open-source components for Amazon Appliance
<a name="aws-appliance-open-source"></a>

Several third-party tools and licenses are used to deliver functionality for Backup gateway.

Use the following links to download source code for certain open-source software components that are included with Amazon Appliance software:
+ For gateways deployed on VMware ESXi, download [sources.tar](https://s3.amazonaws.com/aws-storage-gateway-terms/sources.tar)

This product includes software developed by the OpenSSL project for use in the OpenSSL Toolkit ([https://www.openssl.org/](https://www.openssl.org)). For the relevant licenses for all dependent third-party tools, see [Third-Party Licenses](https://s3.amazonaws.com/aws-storage-gateway-terms/THIRD_PARTY_LICENSES.txt).