Releases in April 2006 and before

github
aria2/aria2 on GitHub release-0.4.1
github
gentoo/portage on GitHub v2.1_pre10
github
secdev/scapy on GitHub v1.0.4.24 v1.0.4.23 v1.0.4.22 v1.0.4.21
freedesktop-gitlab
xorg/xserver on Freedesktop GitLab xorg-server-1_0_99_902
github
secdev/scapy on GitHub v1.0.4.20
github
FarGroup/FarManager on GitHub builds/1.71.2097 builds/1.71.2096
sourceforge
upp on SourceForge OldFiles/upp-src-604-dev4.zip
sourceforge
gnuwin32 on SourceForge patch/2.5.9-5/patch-2.5.9-5.exe patch/2.5.9-5/patch-2.5.9-5-src.zip patch/2.5.9-5/patch-2.5.9-5-src.exe patch/2.5.9-5/patch-2.5.9-5-doc.zip patch/2.5.9-5/patch-2.5.9-5-bin.zip
github
secdev/scapy on GitHub v1.0.4.19 v1.0.4.18 v1.0.4.17
github
secdev/scapy on GitHub v1.0.4.16
github
lavv17/lftp on GitHub lftp-3-4-6
gnome-gitlab
GNOME/gnome-desktop on Gnome GitLab GNOME_DESKTOP_2_15_1
gitlab
wireshark/wireshark on GitLab ethereal-0.99.0
github
wireshark/wireshark on GitHub ethereal-0.99.0
github
secdev/scapy on GitHub v1.0.4.15
Maybe you can find something interesting in this list