There are more, fortunately in my archives, like Zeytok's BBLeanMod, bb4win (the original), bb4winmod (by unkamunka) BBClean N.E.B. (by noccy & EliteForce), BBLeanable, BBDeleted, BBLC (older BB effort by grischka) etc... Will upload them as soon as I get everything in line... And maybe we shouldn't forget nivenh's and tres'ni's Bluebox (the first ever with window skinning), or Lithium Desktop Environment by the Mouse People...
Here is what I found so far...
bb4win_mod.zip 1009.49KB
102 downloads This is the late unkamunka's bb4win build. Includes split and mirror graphics, plus block and wave.
BBClean NEB.zip 227.29KB
60 downloads Noccy's and EliteForce's build.
bblctest-4.zip 49.94KB
25 downloads The latest build of BBLC by grishka I tested back in 2003. Blackbox.exe only, for historical reasons.
BBLeanable.zip 6.23KB
33 downloads BBLeanable, a leaner BB.
Zeytok's BBClean.zip 202.43KB
42 downloads BBClean, the Zeytok version.
bluebox_090605.rar 1.13MB
39 downloads Bluebox by nivenh and Tres'ni, a different beast, the first to use window skinning long before bbwinskin/bbleanskin.
Lithium Desktop Environment.zip 389.53KB
41 downloads The Mouse People's BB branch, the first to use a menu grip, once a commercial program.
BB2.zip 1.73MB
30 downloads Blackbox build that supported pixmap skinning. (Thanks for reminding me, zomby).
bb008lc.zip 66.28KB
24 downloads Grishka's latest BBLC 008.
bbLean_110.zip 146.95KB
14 downloads One of the first versions of BBLean.
bbLean_112.zip 152.93KB
15 downloads The next of the BBLean series.
bbLean_113_b6.zip 86.64KB
19 downloads The last of the BBLean series before 1.16.
Blackbox 29-12-03.zip 165.31KB
18 downloads bb4win, the original, December 2003.
Blackbox_0.0.90b_bs2 Slade Taylor.zip 172.93KB
15 downloads bb4win, the Slade Taylor version. He used to call it "unofficial".
blackbox-0.0.21.zip 114.11KB
16 downloads The first bb4win build by Blackbox for Windows creator, azathoth.
bbMien_712_0003.zip 850.17KB
44 downloads unkamunka's bbmien, added here for grouping purposes. Thanks, zomby.
Utbox.zip 9.87MB
69 downloads kenaku's build, from a Russian team which used it for commercial situations. Thanks for reminding me, meanmechanics.