Hello 29er folk 
I just found a list of 700cc tires at the mtb forums that I updated, and bolded the tires I know have used on 29" unis… Will probably update it with links to corresponding review threads on these forums. Feel free to jump in if you see any inaccuracy or have more information on those tires that haven’t been reviewed yet (not like the Big Apple, the Kenda Klaw & Nevegal, and WTB ExiWolf & Weirwolf, for example.)
Brand Model
0 (Bontrager Jones) ? link
1 Bontrager AcX 2.2
2 Bontrager XR Dry 2.2
3 Bontrager XR F 2.25
4 Bontrager XR R 2.20
5 Bonty Mud X 2.00
6 Bonty XR F/R 1.80
7 Conti Vapor 2.1 (but real narrow)
8 Continental Mountain King 2.4 (2.1 and Mud Queen 2.1+2.4 rumored)
9 CST Critter
10 Geax Saguaro 2.2
11 Halo Choir Master, I saw a pic of it yes.
12 Halo Twin Rail
13 Hutchinson Python
14 Intense System 4 2.25
15 IRC Mythos F
16 IRC Mythos R
17 IRC Notos 2.1
18 IRD/Panaracer Fire XC
19 Kenda Karma 1.9
20 Kenda Karma 2.1
21 Kenda Klaw F
22 Kenda Klaw R link
23 Kenda Nevegal 2.2 link
24 Kenda Small Block 8
25 Maxxis Ardent 29 x 2.25 60tpi casing folding bead
26 Maxxis Crossmark
27 Maxxis High Roller 2.1 (but narrow, never in production)
28 Maxxis Ignitor 2.1
29 Michelin XC AT
30 Nokian Extreme 294 2,1" Wintertire
31 NoTubes The Crow 2.0
32 Panaracer Fire Cross 45
33 Panaracer Rampage
34 Schwalbe Big Apple 2 link
35 Schwalbe Big Apple 2.35 link link link
36 Schwalbe Little Albert 2.1 (but narrow)
37 Schwalbe Racing Ralph 2.25
38 Schwalbe Racing Ralph 2.4
39 Specialized Fast Trak 2.0 (but wide)
40 Specialized Resolution 2.2+2.3 (now discontinued?)
41 Specialized The Captain
42 VRB 209 Ninja (cheap, located on Taiwan trade show, I think
43 WTB ExiWolf
44 WTB Motoraptor
45 WTB Nanoraptor (new tread) link link
46 WTB Nanoraptor (the “tire”, first true 29" tire 1999)
47 WTB Prowler 2.1
48 WTB Stout 2.3
49 WTB Vulpine 2.1
50 WTB Weirwolf link