Tangentially related: the plumber program from UNIX R11^W^W Plan 9 makes programs work together by piping text around. http://doc.cat-v.org/plan_9/4th_edition/p

Tangentially related: the plumber program from UNIX R11^W^W Plan 9 makes programs work together by piping text around. http://doc.cat-v.org/plan_9/4th_edition/papers/plumb http://doc.cat-v.org/plan_9/4th_edition/papers/plumb Again, there is more value in the connections than in the individual programs themselves.