OpenXava - OpenXava is a Web Java Framework for Rapid Development of Enterprise Applications.
Ping-O-Matic - Service to update different search engines that your blog has updated.
jHipster - JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.
TotalPing! - Promote your blog with TotalPing!
Spring Framework - The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform.
Pingler - Pingler is a tool that allows you to ping your blog or website, so that followers can know if your site is online after any update, maintenance, etc.