Releases in May 2006 and before

github
ntpsec/ntpsec on GitHub NTP_4_2_1P257_RC
github
aria2/aria2 on GitHub release-0.5.0
github
sqlalchemy/sqlalchemy on GitHub rel_0_2_1 rel_0_2_0
github
ntpsec/ntpsec on GitHub NTP_4_2_1P256_RC
github
GNOME/dia on GitHub DIA_0_95_1
github
GNOME/gtk on GitHub GTK_2_8_18
github
ntpsec/ntpsec on GitHub NTP_4_2_1P255_RC
github
GNOME/glade on GitHub WITH_EMBEDDED_DEVHELP
github
ntpsec/ntpsec on GitHub NTP_4_2_1P254_RC
github
FarGroup/FarManager on GitHub builds/1.71.2104
github
wine-mirror/wine on GitHub wine-0.9.14
sourceforge
gameextractor on SourceForge Language Packs/1.5508/Russian_Alternate.txt
github
FarGroup/FarManager on GitHub builds/1.71.2103
github
cms-sw/cmssw on GitHub CMSSW_0_6_1
freedesktop-gitlab
xorg/xserver on Freedesktop GitLab xorg-server-1_1_0 XORG-7_1
sourceforge
upp on SourceForge OldFiles/upp-src-B605-dev1.zip
github
ntpsec/ntpsec on GitHub NTP_4_2_1P253_RC
sourceforge
keepass/KeePass 1.x on SourceForge 1.05/KeePass-1.05-Src.zip 1.05/KeePass-1.05-Setup.exe 1.05/KeePass-1.05.zip
Maybe you can find something interesting in this list