What it is
OKZest creates personalised images for email and marketing. You design one on-brand template, connect your campaign data, and OKZest generates the finished images automatically: a subscriber's name on a banner, a city on a background, that sort of thing. There's a no-code visual editor for marketers and an API for technical teams. It works with 99% of email service providers and there's a free plan to try it.
Why it matters to me
I built it myself in ASP.NET/C#, and it's where most of my spare time goes.