add source code/demo links, language/platform and license for racktables

README.md

@@ -375,7 +375,7 @@ _See also: [IT Asset Management]([Ralph](#it-asset-management))_
 * [GLPI](https://www.glpi-project.org/) - Information Resource-Manager with an additional Administration Interface.
 * [OCS Inventory NG](https://ocsinventory-ng.org/?lang=en) - Enables users to inventory their IT assets.
 * [OPSI](http://www.opsi.org) - Hardware and software inventory, deployment, and patching for Linux and Windows.
-* [RackTables](http://racktables.org/) - Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration.
+* [RackTables](http://racktables.org/) - Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration. ([Source Code](https://github.com/RackTables/racktables), [Demo](https://www.racktables.org/demo.php)) `GPL-2.0` `PHP`
 * [Ralph](https://ralph.allegro.tech/) - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks. ([Source Code](https://github.com/allegro/ralph), [Demo](https://github.com/allegro/ralph#live-demo)) `Apache-2.0` `Python/Docker`
 * [Snipe IT](https://snipeitapp.com/) - Asset & license management software. ([Source Code](https://github.com/snipe/snipe-it)) `AGPL-3.0` `PHP`