あちらこちらのサイトで「OmniWeb」がフリーになったという書き込みを見てどこに書いているのかウロウロ探してしまいました。
「Omni Store」のページにこう書いてありました。
Looking for our other applications?
We have recently released some of our previously-commercial applications for free, in order to focus on our core applications. See our main web site for more information on OmniWeb, OmniDazzle, OmniDiskSweeper, and for you developers, OmniObjectMeter. There you can download the latest releases of these applications, which are now free and no longer require license keys to be entered in order to use them. Enjoy!
