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
github
bminor/binutils-gdb on GitHub gdb-csl-morpho-4_1-4 binutils-csl-morpho-4_1-4
github
codership/mysql-wsrep on GitHub mysql-4.1.19 clone-4.1.19-build
freedesktop-gitlab
xorg/xserver on Freedesktop GitLab xorg-server-1_0_99_902
sourceforge
swissfileknife on SourceForge 1-swissfileknife/1.0.7/sfk107.zip
github
secdev/scapy on GitHub v1.0.4.20
github
bminor/binutils-gdb on GitHub binutils-csl-wrs-linux-3_4_4-21
github
BOINC/boinc on GitHub client_release/5.4/5.4.7
github
zopefoundation/Zope on GitHub backups/regebro-wsgi_refactor@67833
sourceforge
ganglia on SourceForge ganglia monitoring core/3.0.3 (Orwille)/ganglia-gmond-3.0.3-1.rhel4.x86_64.rpm ganglia monitoring core/3.0.3 (Orwille)/ganglia-gmond-3.0.3-1.rhel4.ia64.rpm ganglia monitoring core/3.0.3 (Orwille)/ganglia-gmetad-3.0.3-1.rhel4.x86_64.rpm ganglia monitoring core/3.0.3 (Orwille)/ganglia-gmetad-3.0.3-1.rhel4.ia64.rpm ganglia monitoring core/3.0.3 (Orwille)/ganglia-devel-3.0.3-1.rhel4.x86_64.rpm ganglia monitoring core/3.0.3 (Orwille)/ganglia-devel-3.0.3-1.rhel4.ia64.rpm
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
Maybe you can find something interesting in this list