@erikaheidi: All of them. 😎 More or less at least:

* I preferred #picocom over #minicom. And for quite a while I only use GNU #Screen for all my #serial connection needs. 😎

* I preferred #ircII over #bitchX. Later switched to #irssi.

* I used the #pon and #poff scripts instead of #pppd directly. Also used #wvdial occasionally

* I used #licq as #ICQ client.

And from those programs which I used in production, I'd say that either #xf86conf or icq is the one I haven't used for the longest time.