Releases in January 2004 and before

github
torproject/tor on GitHub debian-version-0.0.1+0.0.2pre20-1 tor-0.0.2pre20
gnome-gitlab
GNOME/gtksourceview on Gnome GitLab ENGINE_SPLIT_BRANCHPOINT
github
lilypond/lilypond on GitHub release/2.1.16
github
secdev/scapy on GitHub v0.9.16.1 v0.9.15.15
github
libfuse/libfuse on GitHub fuse_1_1_pre2
github
bminor/binutils-gdb on GitHub carlton_dictionary-20040126-merge
github
lilypond/lilypond on GitHub release/2.1.15
sourceforge
nsis on SourceForge NSIS 2 Pre-release/Release Candidate 3/makensis20rc3_no_solid.zip NSIS 2 Pre-release/Release Candidate 3/nsis20rc3.exe
github
doxygen/doxygen on GitHub Release_1_3_5_20040125
github
reactos/reactos on GitHub backups/ros-branch-0_2_0@12453 ReactOS-0.2.0
github
openSUSE/xinetd on GitHub xinetd-2-3-13
github
lavv17/lftp on GitHub lftp-2-6-12
github
root-project/root on GitHub v3-10-02 v3-10-01a v3-10-01
gitlab
openldap/openldap on GitLab OPENLDAP_REL_ENG_2_2_5 OPENLDAP_REL_ENG_2_1_26
github
znuny/Znuny on GitHub rel-1_2_0_beta1 rel-1_2_0-b1
Maybe you can find something interesting in this list