I've only bought HL (boxed, but I put the serial into steam), HL2 (boxed, serial put on steam, since gifted) and Orange Box (on steam), but I've got:
any of the non-source mods are free with original hl. however, blue shift and opposing force were expansion packs and not mods. however, since original hl is now only $10, they might just give them away for free. i have orignal cd's for hl and the 2 expansions so not sure what is included on steam now (check the steam store for details).
as far as cs:source, that is not bundled with orange box. however, it was bundled with hl2 in certain store/steam packages.
fyi, get orange box and cs:s separately if you have to. they both rock.