Tweakr: Not a daemon (OK, its profile applet is "resident"). Besides the setting you talk of can be changed by editing mce.ini. (Used by MCE, a closed Nokia daemon)

savepress: Written in Python (the others are C or C++)

extended-locked-media-control: As you said, it's closed and its developer AWOL
Also, it links with media libraries like MAFW - bloat for those who don't need it in shortcutd?