No specific info about version 5.1. Please visit the main page of RSSMate on Software Informer.
RSS Bandit is an open-source RSS and Atom feeds reader.
Feed Writer is a RSS editor for creating and maintaining RSS news feeds.
It allows creating, modifying, viewing and publishing RSS feeds and podcasts.
RSS Publisher can create and edit RSS feeds for your website.
RSS AutoGen is a tool used to automatically convert web pages.
RSSeditor lets you generate RSS feeds for your website.