Releases in May 2003 and before

github
secdev/scapy on GitHub v0.9.13.3 v0.9.13.2
sourceforge
graphicsmagick on SourceForge OldFiles/GraphicsMagick-1.1-20030529.zip OldFiles/GraphicsMagick-1.1-20030529.tar.gz OldFiles/GraphicsMagick-1.1-20030529.tar.bz2 OldFiles/GraphicsMagick-1.1-20030523-windows-source.zip
github
fvwmorg/fvwm on GitHub version-2_5_7 version-2_4_16
gitlab
openldap/openldap on GitLab OPENLDAP_REL_ENG_2_1_21
github
FarGroup/FarManager on GitHub builds/1.70.1665
github
bestpractical/rt on GitHub rt-3.0.3pre1
github
lavv17/lftp on GitHub lftp-2-6-6
github
doxygen/doxygen on GitHub Release_1_3_1
sourceforge
pcre on SourceForge pcre/4.3/pcre-4.3.tar.gz pcre/4.3/pcre-4.3.tar.bz2 pcre/4.0/pcre-4.0.tar.bz2 pcre/4.2/pcre-4.2.tar.gz pcre/4.2/pcre-4.2.tar.bz2 pcre/4.1/pcre-4.1.tar.gz pcre/4.1/pcre-4.1.tar.bz2 pcre/4.0/pcre-4.0.tar.gz
github
bminor/binutils-gdb on GitHub jimb-ppc64-linux-20030528-branchpoint
github
FarGroup/FarManager on GitHub builds/1.70.1664 builds/1.70.1663
github
scummvm/scummvm on GitHub closed/branch-0-4-0
Maybe you can find something interesting in this list