You can quite easily poach binaries from the older Debian repositories, like this one
http://packages.debian.org/etch/Binaries from more recent repositories (like "lenny") will complain about outdated system libraries.
Dependency resolution is (of course) manual, but you will find most missing libraries on Debian too
Stuff I got running on my TC 1.4 this way include
- MAME (arcade game emulator) and gxmame (a frontend for it). Mame runs excellent. Frontend has some small bugs but it's usable.
- galculator (a x X calculator applet). This one is very easy to get running
- Xarchiver (a graphical zip/unzip gz/ungz etc tool). I also installed the .deb for the RAR file format from Debian (unrar.tce is not recognized by Xarchiver)
- supertux (since a couple of days a supertux TCE for TC 2.0 is available - but the Debian version runs on TC1.4 too - works absolutely flawless)
- numlockx: an utility to switch the numlock LED on when you start X
- the Tuxkart game worked but had an appalling framerate so I uninstalled it. If you have working 3D acceleration you could try this one
- gnuboy (Nintendo Gameboy emulator) works but the sound is very distorted