Good Open Source Front End for Solr

Hi, What is the best open source front-end for Solr Thanks

Portable Solr

Hi, Like portable embedded web server (Spring Boot or Takes Or Rapid) Takes ( https://github.com/yegor256/takes) or Undertow (http://undertow.io/) or Rapidoid (https://www.rapidoid.org/) Do we have portable Solr server? Want to build an Web application with Solr with portability? The user needs