This list doesn't hit all sources (yet), and is specifically a list of deckplans:
Type S and Type J (and other "Scouts"):
Type S
Scout/Courier, 100 tons, CT, Starships and Spacecraft (Judges Guild)
Intrepid Scout/Courier, 100 tons, CT, Snapshot
Sulieman Scout/Courier, 100 tons, CT, Traders and Gunboats
Bounty Scout, 100 tons, n/a, The Traveller's Digest 4 (Seeker ad)
Monitor Scout, 100 tons, MT, Challenge #38
Ninz Scout (Zhodani), 100 tons CT, Adventure Class Ships Vol 1 FASA folio
Ranger Courier (Imp.), 100 tons, CT, Space Gamer #81
M:0 Scout/Courier, 100 tons, T4, Starships (incomplete; nuff said)
Scout (Vargr), 100 tons, TNE, Traveller Chronicle #8
Serpent Scout, "100" tons, CT, JTAS #2
Serpent Scout (CS), "100" tons, CT, Scouts and Assassins pull out
Scout/Courier, 100 tons, T20, Epic Adventure 1-Stoner Express, Epic Adventure 2-Into the Glimmer Drift, and Epic Adventure 3-Chimera
1248 Scout/Courier, 100 tons, CT, Starships 2-Scout Ships (Comstar/Avenger)
Scout/Courier, 100 tons, MGT, Mongoose CRB
Sulieman Scout/Courier, 100 tons, GT, GT Main Rulebook (hexes)
Scout (Droyne), 100 tons, GT, GT Alien Races 3 (hexes)
Type J
Seeker, 100 tons, CT, Traders and Gunboats
Khazad Seeker, 100 tons, CT, White Dwarf #23
Seeker, 100 tons, MT, Traveller's Digest #21 DGP ad; partial plans
1248 Seeker, 100 tons, CT, Starships 2-Scout Ships (Comstar/Avenger)
Seeker, 100 tons, MGT, Mongoose CRB
Other "Scout" ships:
X-Boat, 100 tons, CT, Traders and Gunboats
1248 X-Boat, 100 tons, CT, Starships 2-Scout Ships (Comstar/Avenger)
Express Boat, 100 tons, GT, GT First In (hexes)
Fast Courier/Blockade Runner (Sword Worlds), 130 tons, T20, QLI "Forgotten War"
Chatl Leader Scout (Zhodani), 150 tons, CT, Adventure Class Ships Vol 1 FASA folio
CF Fast Courier, 200 tons, T20, Golden Age Starships 1-Fast Courier
Stayaow Combat Scout (Aslan), 200 tons, CT, Adventure Class Ships Vol 2 FASA folio
EDSV Fighting Scout, 300 tons, T4, Gateway
EDSV Fighting Scout, 300 tons, T4, Long Way Home
Explorer Scout Ship, 300 tons, CT, White Dwarf #40
Donosev Scout Cruiser, 400 tons, MT, World Builder's Handbook
Donosev Survey Ship, 400 tons, CT, Grand Survey
Donosev Survey Ship, 400 tons, GT, GT First In (hexes)
Khadumir Fast Courier, 400 tons, GT, GT First In (hexes)
Telemon Survey Scout (1248), 400 tons, CT, Starships 2-Scout Ships (Comstar/Avenger)
St. Christopher Explorer, 490 tons, CT, White Dwarf #26
Kurgilash Medical Scout, 400 tons, CT, Adventure Class Ships Vol 2 FASA folio
Kon-Tiki Scout Cruiser, 800 tons, T4, Milieu 0 Campaign
X-Boat Tender, 1000 tons, CT, Traders & Gunboats
Purcell X-Boat Tender, 1000 tons, GT, GT First In (hexes)
1248 X-Boat Tender, 1000 tons, CT, Starships 2-Scout Ships (Comstar/Avenger)
Qasar Scout Cruiser, 1000 tons, T20, Epic Adventure 5-Scout Cruiser
Machii Scout Cruiser (1248), 1000 tons, CT, Starships 2-Scout Ships (Comstar/Avenger)