I maintain projects in a few categories below. All of those, except for the JavaScript ones, are used in production.

I have many more projects that I no longer maintain, but feel free to explore them in the Repositories tab. I also contribute to other projects, which you'll find in my contribution activity below.

OpenID Connect and OAuth for JVM projects

• OIDC-Servlets to add OpenID Connect to your servlets-based application, with support for JAX-RS.
• OAuth-Servlets and OAuth-RS to add OAuth 2 to your servlets-based or JAX-RS Web APIs.

Gradle plugins, and related

• net.ltgt.errorprone and its companion net.ltgt.nullaway to seamlessly use Google's Error Prone and Uber's NullAway in your Gradle builds.
• net.ltgt.flyway to get Flyway tasks like flywayMigrate; lighterweight than the official plugin, with easier control (and isolation) on its dependencies.
• net.ltgt.jooq and net.ltgt.jooq-kotlin to run the jOOQ code generator against your database, in order to commit the generated files; lighterweight than the official plugin, with easier control (and isolation) on its dependencies; works well with the net.ltgt.flyway plugin.
• Gradle IncAP Helper: an annotation processor to help declare your own annotation processor's support for Gradle's incremental annotation processing.

JavaScript and Web development

• Webfeet: a set of libraries to help make your JS APIs (incl. custom elements) swim like a duck behave like native, or in other words behave closer to the web platform as currently spec'd.
• decorator-compose to create decorators that compose other decorators
• parameters-decorator: a method decorator to bring parameter decorators to ECMAScript (based on the TC39 proposal)

GWT and Maven

• Maven Plugin for GWT to integrate GWT tools into your Maven project
• GWT Maven Archetypes a couple archetypes to get started with GWT projects using Maven
• If you're curious about using GWT with Gradle, I have an archived repository showing how I did that.