Jibz: on win-rar.com perhaps, but not rarlabs.com which I've always used.
Yep, does seem like they might want to pull the plug on lifetime licenses; can't say I blame them, but it's a bit sad nonetheless. If they pull the free upgrades, I'm moving to 7-zip, it's mature enough by now imho. It doesn't have as many nice commandline options as rar.exe, but I'll live; haven't needed NTFS permissions or alternative data streams in archives, either.
As long as I can extract .rar files, subsequent packaging can be done in another tool, and having a truly open format is a definite bonus.
There´s another one that could get very important in the future missing in the list: Nanozip
It has the best compression power and its goal is envolving to create new and higher compression algorithms compared to others. Some testfiles have become the half of 7zip in ultra - depending on the data.
You can check out an actual comparison to other archivers here.-Crush
We'll see - as long as it's binary-only, it's uninteresting apart from academic purposes.