In fairness, I should note that there are
PD software titles (and even
src code) that were once commercial (and still sometimes included in classic game bundles).
My list of wants include:
Emulators
Any game systems that can be run decently
Atari 2600-7800
DOS
Commodore (I miss my VIC20 that taught me to use BASIC)
MIPS (to use Dingux, etc. software)
TI calculators (Z80/68K/ARM)
Interpreters
ASM (any CPU architecture)
BASIC
BRAINF*CK/Turing
C (yes they do exist)
Lisp
LOGO
LUA
Python
SCUMM VM
General
A real 3D paint program
Document editor (RTF, spreadsheet)
HEX editor
Sound recorder, editor
Garage Band-like composer
File explorer with SMB and/or AdHoc WIFI, etc.
Universal remote
VNC/RDP client
WIFI gamepad
WIFI scanner/sniffer
Shared whiteboard/chat with local and online capability
IRC client
SSH client
DO IT! (JK.. I want to contribute with things on the list)