I always had this idea about creating a small, open-source application suite for classic systems (OS 3.1 and 2+ Mb RAM), with a small-footprint web browser, word processor and so on. Everything would be system-friendly and would run on a plain OS 3.1 install.
I never got around to it as I lack the time, skill, experience, and lately, motivation. Besides, the demand for stuff like this is minimal anyway.