Dear Community,
We have released the first free version of Network Builder IDE - v1.0 (LITE).
You can find the Installation Guide here: Installation Guide - PacketCord
The release contains the Hardware Blueprints Builder with example snippets, so that you can try to design your own simple network whitebox; and also the Topology Blueprints Builder with example containers to test your network applications within a complete topology setup with data-planes like XDP and DPDK.
UPDATE (version removed from title) 
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Enjoy!