Releases in June 2005 and before

github
mono/mono on GitHub mono-1-1-8-2
sourceforge
winmerge on SourceForge OldFiles/WinMerge-2.3.4.0-src.zip OldFiles/WinMerge-2.3.4.0-src.7z OldFiles/WinMerge-2.3.4.0-Setup.exe OldFiles/WinMerge-2.3.4.0-manual.zip OldFiles/WinMerge-2.3.4.0-manual.7z OldFiles/WinMerge-2.3.4.0-Innosetup-src.zip OldFiles/WinMerge-2.3.4.0-Innosetup-src.7z OldFiles/WinMerge-2.3.4.0-exe.zip OldFiles/WinMerge-2.3.4.0-exe.7z OldFiles/WinMerge-2.3.4.0-doxygen.zip OldFiles/WinMerge-2.3.4.0-doxygen.7z
github
net-snmp/net-snmp on GitHub Ext-5-0-10-2 Ext-5-2-1-2
github
net-snmp/net-snmp on GitHub Ext-5-1-3 Ext-5-2-1-1 Ext-5-0-10-1
github
torproject/tor on GitHub tor-0.1.1.1-alpha
sourceforge
sevenzip on SourceForge LZMA SDK/4.23/lzma_cs423.tar.bz2 LZMA SDK/4.23/lzma423.tar.bz2
github
FarGroup/FarManager on GitHub builds/1.70.2010 builds/1.70.2009
sourceforge
sevenzip on SourceForge 7-Zip/4.23/7z423_extra.tar.bz2 7-Zip/4.23/7za423.zip 7-Zip/4.23/7z423.tar.bz2 7-Zip/4.23/7z423.exe
github
wine-mirror/wine on GitHub wine-20050628
gnome-gitlab
GNOME/gnome-desktop on Gnome GitLab GNOME_DESKTOP_2_10_2
Maybe you can find something interesting in this list