Open Source projects I have created and worked on over the last several years
I experimented with many different technologies and ideas, and some of them made their way into the world in the form of Open Source projects. Some are used by many, and some still relatively unknown. Here are a few of them:

Eventvisor
Fine-grained control over analytics events and logs via remote configuration.
eventvisor.org

Featurevisor
Feature flags and remote configuration management for developers.
featurevisor.com

Proppy
Functional props composition for React, Preact, and Vue.js components.
proppyjs.com

Frint
Modular JavaScript framework for building scalable and reactive applications.
frint.js.org

Tydel
Typed data structures in the form of models and collections for JavaScript applications.
tydel.js.org

Croogo
Content Management System with custom content types, themes, and extensions.
github.com