Feedreader - Totally Free RSS / ATOM Newsreader / Aggregator:
This is cool, here is a small free fully customizable RSS reader that we can use for our feed reader list project. We can offer a download the OPML list OR the OPML list embedded in this application! This will Make it really easy for our clients, prospects and media contacts if they already have a preferred RSS reader then they can download the OPML list, but if they don't have a reader yet, no problem, you can download ours.

Simple: Feedreader's functionality is focused on the main task - reading and organizing RSS feeds and offering seamless user experience.
Lightweight: One of the main goals of Feedreader architecture is to keep its footprint small. Say goodbye to bloat: installation file is under 1.5MB.
Free: And we mean free, no caveats here. Feedreader is licensed under GPL and its source is available for download.
Customizable: Build on it, tailor it to your needs or even re-brand it for your customers. "