Releases in August 2006 and before

github
mono/mono on GitHub mono-1-1-17-1
github
cms-sw/cmssw on GitHub CMSSW_0_8_4
github
apache/maven-jar-plugin on GitHub maven-jar-plugin-2.1
github
ntpsec/ntpsec on GitHub NTP_4_2_3P38
freedesktop-gitlab
mesa/mesa on Freedesktop GitLab texmem_0_2_20060912
sourceforge
upp on SourceForge upp-development/608-dev2/upp-src-608-dev2.zip upp-development/608-dev2/upp-mingw-608-dev2.exe upp-development/608-dev1/upp_608-dev-1_i386.deb
github
ocaml/ocaml on GitHub 3.09.3-rc1
github
belaban/JGroups on GitHub JGroups_2_4_CR2
github
znuny/Znuny on GitHub rel-2_1_0_beta2 rel-2_1_0-b2
github
bminor/binutils-gdb on GitHub binutils-csl-renesas-4_1-9
github
ntpsec/ntpsec on GitHub NTP_4_2_3P37
github
BOINC/boinc on GitHub client_release/5.6/5.6.0
github
aria2/aria2 on GitHub release-0.7.3
github
cms-sw/cmssw on GitHub CMSSW_0_9_2
github
gregkh/linux on GitHub v2.6.18-rc5
github
PyMySQL/mysqlclient on GitHub MySQLdb-1.2.2b1
github
torproject/tor on GitHub tor-0.1.2.1-alpha
github
reactos/reactos on GitHub backups/ros-branch-0_3_0@23785 ReactOS-0.3.0
github
secdev/scapy on GitHub v1.0.4.74 v1.0.4.73 v1.0.4.72 v1.0.4.71 v1.0.4.70 v1.0.4.69
Maybe you can find something interesting in this list