Releases in November 2003 and before

github
mono/mono on GitHub MONO_0_29
sourceforge
ditto-cp on SourceForge OldFiles/2.0_Prerelease_DittoSetup.exe OldFiles/2.0_Prerelease_DittoSource.zip
sourceforge
smartmontools on SourceForge smartmontools/5.26/smartmontools-5.26.tar.gz.asc smartmontools/5.26/smartmontools-5.26.tar.gz smartmontools/5.26/smartmontools-5.26-1.src.rpm smartmontools/5.26/smartmontools-5.26-1.i386.rpm
github
cyrusimap/cyrus-imapd on GitHub cyrus-sasl-2.1.17
sourceforge
cxx on SourceForge CXX/pycxx V5.2.0/pycxx_5_2_0.tar.gz
freedesktop-gitlab
xorg/app/xeyes on Freedesktop GitLab XORG-RELEASE-1-BASE XEVIE-MERGE XEVIE-BASE
github
bestpractical/rt on GitHub rt-3.0.8pre1
github
apache/solr on GitHub releases/lucene/1.3-rc3
freedesktop-gitlab
xorg/app/xeyes on Freedesktop GitLab xf86-4_3_99_903_special xf86-4_3_99_902 xf86-4_3_99_901 xf86-4_3_99_16 xf86-012804-2330
github
live-clones/gmsh on GitHub gmsh_1_48_1
sourceforge
keepass/KeePass 1.x on SourceForge 0.83b/KeePass-0.83b-Src.zip 0.83b/KeePass-0.83b.zip 0.83/KeePass-0.83-Src.zip
Maybe you can find something interesting in this list