No credit card required. No setup fees.
The development tool iiziGo only runs under 64 bit Windows 7 or better. You need minimum 8 GB RAM, 1 GB free disk space and a full HD display or better.
The Windows setup downloads consists of the entire iizi platform and optionally including a Java Software Development Kit (Oracle JDK 1.8, when "JDK" is part of the download file name).
iiziGo versions for macOS and Linux GTK are also available on the download page, but are in ALPHA stage (so please avoid them).