http://linuxiac.com/category/news/
I used to follow, and find out about, free & open source software from new release info posted on linuxtoday. Then, probably 5+ years ago, they suddenly stopped posting new software releases. I searched and searched and couldn't find a good replacement (distrowatch.org mostly focuses on new linux OPERATING SYSTEM releases).
Today, on a lark, I searched again (I still couldn't believe there wasn't a site providing this news) and I just found this site! It is pretty much linux oriented -- but I'm sure if a package is popular there is probably a MacOS release in the works, and maybe even a Windows release (e.g. office packages and other things).
Just in case you have an interest in software other than only browsers.