WizTech is the expanded business stemming from ZenCartDelia.com.
Wiztech's president and CEO is Zen Cart Delia, Delia Wilson Lunsford. We are in the process of converting her sites over to WizTech which means you might find links leading to either zencartdelia.com or deliawilsondesign.com - especially for purchases.
Delia has been a Zen Cart developer for many years and is well known for her posts and mods on ZenCart.com. Just look for her - she's not hiding but using her real name delia as her forum name.