Releases on May 31st, 2012 and before

nuget
Microsoft.AspNet.Mvc on .NET NuGet 4.0.20505 3.0.20105.1
github
FarGroup/FarManager on GitHub builds/3.0.2714
github
cms-sw/cmssw on GitHub CMSSW_6_0_0_pre6
github
MrAlex94/Waterfox on GitHub RELEASE_BASE_20120531
github
xwiki/xwiki-platform on GitHub xwiki-platform-4.1-milestone-2
github
FarGroup/FarManager on GitHub builds/3.0.2713
npm
mysql on Node.js NPM 2.0.0-alpha2
github
qemu/qemu on GitHub v1.1.0-rc4
github
FarGroup/FarManager on GitHub builds/3.0.2712
Maybe you can find something interesting in this list