Releases on April 13th, 2008 and before

github
lilypond/lilypond on GitHub release/2.11.44-1
sourceforge
keepass/KeePass 1.x on SourceForge 1.11/KeePass-1.11.zip 1.11/KeePass-1.11-Setup.exe 1.11/KeePass-1.11-Src.zip
github
mamedev/mame on GitHub mame0124u2
sourceforge
codeblocks on SourceForge Binaries/Nightlies/2008/CB_20080410_rev5000_mac287.zip
github
FarGroup/FarManager on GitHub builds/1.71.2354 builds/1.80.475
github
cms-sw/cmssw on GitHub CMSSW_2_0_0
github
GNOME/gimp on GitHub git-migration-GIMP_2_5_0
gnome-gitlab
GNOME/gimp on Gnome GitLab git-migration-GIMP_2_5_0
github
GNOME/gimp on GitHub GIMP_2_5_0
github
GNOME/glade on GitHub GLADE3_3_5_2 GLADE3_3_5_1
github
GNOME/evince on GitHub EVINCE_2_22_1_1
gitlab
libvirt/libvirt on GitLab v0.4.2 LIBVIRT_0_4_2
github
KDE/digikam on GitHub v0_9_4_beta3
sourceforge
keepass/KeePass 2.x on SourceForge 2.05/KeePass-2.05-Alpha.zip 2.05/KeePass-2.05-Alpha-Source.zip
Maybe you can find something interesting in this list