Nik Collection by Google Now Free!
This is a surprise… today, Google announced that Nik Collection by Google (formerly Nik Plugins) is free for download! If I recall, this used to be around $500 before Google acquired Nik Software, then it was I believe $150 under Google, but now it's free.
Read the release and get the download links from here: “Today we’re making the Nik Collection available to everyone, for free.”
In my opinion, the tool Silver Effex Pro is still the best B&W tool available.