I couldn't find system requirements for this one, but he does offer a 68k version.
http://asg.andrew.cmu.edu/andrew2/dist/niftytelnet.html
http://www.lysator.liu.se/~jonasw/freeware/niftyssh/
If I were where I am now [HS Senior] in 1986 I'd be accustomed to Apple II software, so that and color would send me to the IIgs. Luckily I now have both and don't have to make a choice.
I just sold a TS1000 last month.
I have had TenFourKit as the framework on my B&W for quite a while without issue. Installing Leopard-WebKit system wide in 10.5 can create some problems with Software Update trying to re-update Safari, but anymore that is a moot point.
I can't speak for Leopard-WebKit directly, but I have used TenFourKit, which is currently at WebKit 533.21.1, which is equivalent to Safari 5.0.5 from April 2011. I use it with the installer scripts [that Tobias graciously provided at my request] to install the updated WebKit as a replacement to...
MintPPC 11's base is still Wheezy and Wheezy is the current Debian stable release. The only "old" packages are really those that make it look and feel like Linux Mint rather than straight Debian. Upstream keeps all the important stuff up to date (well, as much as Debian keeps anything "up to...
You can also lighten the system a bit by disabling the login manager and invoking your preferred DE/WM via startx/xinit. I do that on MintPPC 9 to save some RAM/CPU Cycles.
My first choice would be Debian + LXDE. Second would be Crunchbang. Third would be Xubuntu. After that I'm not too sure. LMDE? Slackware? One of the ultra light versions of openSUSE based on RazorQt or KDE4 Klyde?