One is the basket case 1990 Trek 790 that I've shared in here before. Well, I didn't care for the flat bar, and put an Origin8 Gary bar on it. Added some SPD pedals. Also changed the rack from the Topeak Explorer to the Topeak Super Tourist. The VO saddle is pretty cool, too!
Then I got a super cheap 1992 Trek 750 that was neglected for well over a decade. I put new tires/tubes on; changed the bar/stem to a low rise mtn. bike bar; better saddle that I had; added the rack that I had on the 790 (Topeak Explorer); added some Shimano trigger shifter/brake levers & threw the broken Grip Shifters away; all new cables & housings; and new bottle cages. Now my son has a really nice commuter!