For years I have used Podcast Maker by Lemonz Dream to create my RSS feeds for podcasts.. It worked beautifully until Yosemite came out and now it hangs on launch. It appears abandoned by the developer. I searched to find a good replacement and found options to be limited. Feeder seemed to be the most full-featured and capable of handling my needs so I contacted the developer who responded almost immediately (a good sign). It took me a little bit to catch on to the differences between it and Podcast Maker. I had a little trouble with the upload directories in the previous version, however, version 2.56 resolved all those issues and now works perfectly.
I initially did not think the ability to share to social media would be significant, but it has been. It has dramatically increased the hits to my podcast. I am extremely happy with Feeder now. Thanks to Steve at Reinvented Software for his help getting started!