The game has been mostly ported to SDL but the SDL port is unplayable. The stable version depends on the aged and not well supported Clanlib 0.6 and it seems there is not enough interest or expertise in upgrading Pingus to Clanlib 0.8 which was released earlier this year. Anyway, a few people have expressed interest in working on the codebase so we can only hope that interest can be turned into tangible progress.
JCRPG continues to get new features, now featuring day and night cycles among other things. If that project keeps up the current development pace we'll have a tidy game come out of the JCRPG framework before the end of the year.
Orbiter. A mature 3D project for contemporary space flight simulation. No explosions.
Snowball is an interesting looking platform game. No development for two years but perhaps it does not need it? Next development is "on ice" - I'm going to inquire to see if that is still the case.
I'm running a little experiment in the FG forums. I've set up Project Open - a place to organise efforts for open sourcing games that would benefit from it, essentially freeware and abandonware games. I'm not going to make much of it until I've managed to successfully encourage somebody to open up their game, but the idea was not mine so it is obvious that there is a desire for this.