Back during OpenSolaris many years ago we opened the code for the project over a series of 80 releases over 5 years.
I kept track of my own history on OpenSolaris here
grisanzio.com/opensolaris/ along with the full release list below.
Many of the links on the page are now broken, so I'm starting to go back and update the content with links to the Web archive where I can find stuff.
More updates to come.
OPENSOLARIS SOURCE RELEASE HISTORY
2005
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01/25/05: OS/Networking (ON) Consolidation: DTrace Source Code
06/14/05: ON Consolidation (kernel) Source Code
10/28/05: JDS Consolidation Source Code
10/28/05: Dev Pro Consolidation: libm Binaries
11/10/05: Dev Pro Consolidation: SCCS/make Binaries
11/10/05: Install Consolidation: Package Tools Binaries
11/15/05: OpenGrok Source Browser Source Code
11/16/05: ZFS Project integrated into ON Build 27
2006
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01/27/06: Network Storage Consolidation Source Code
02/22/06: DevPro Consolidation: libm/limvec Source Code
02/28/06: DevPro Consolidation: libmtsk Binaries
03/06/06: Install Consolidation: Packaging Tools Source Code
03/29/06: SFW Consolidation Source Code
03/31/06: Documentation Consolidation: Source for ZFS Administration Guide, Device Driver Tutorial
03/31/06: X Window System Consolidation Source Code
05/10/06: Globalization Consolidation: Source for OS/Net Consolidation Message Files
05/31/06: Documentation Consolidation (4 books total): Source for, Solaris Dynamic Tracing Guide, System Administration Guide: Solaris Containers, Resource Management and Solaris Zones
06/12/06: DevPro Consolidation: medialib Source Code
06/26/06: Companion CD Source Code
06/30/06: Documentation Consolidation: Source for OpenSolaris Developer’s Reference Solaris Containers: Resource Management and Solaris Zones Developer’s Guide
07/28/06: Documentation Consolidation: Source for Solaris Volume Manager System Administration Guide, Solaris Express Installation Guide: Basic Installations
08/31/06: Documentation Consolidation: Source for Solaris Trusted Extensions Installation and Configuration Guide, Solaris Trusted Extensions Label Administration, Solaris Trusted Extensions User’s Guide, Solaris Trusted Extensions Transition Guide, Solaris Trusted Extensions Developer’s Guide, Solaris Express Installation Guide: Solaris Flash Archives, System Administration Guide: Basic Administration, System Administration Guide: Advanced Administration
09/11/06: BrandZ Project integrated into ON Build 49
09/26/06: DevPro Consolidation: SUNWlibC (C runtime libraries) Binaries
09/29/06: Documentation Consolidation (19 books total): Source for Application Packaging Developer’s Guide, DTrace User Guide, Solaris Trusted Extensions Administrator’s Procedures.
10/06/06: Solaris PowerPC project source release
10/20/06: SPARC Graphics Consolidation: Device Driver Binaries
11/30/06: Documentation Consolidation: Source for Solaris Express Installation Guide: Custom JumpStart and Advanced Installations, Solaris Express Installation Guide: Planning for Installation and Upgrade, Solaris Tunable Parameters Reference Manual, System Administration Guide: Security Services
12/08/06: Man Page Consolidation: Source for an initial set of 356 man pages
12/18/06: ON Test: Source for the NFSv4 Test Suite
12/19/06: DevPro Consolidation: Source for SCCS and make
12/22/06: Globalization Consolidation Source Code
2007
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01/18/07: Globalization Consolidation: Source for multiple translations
01/26/07: Man Page Consolidation: Source for a second set of 2790 man pages (total: 3146)
02/20/07: Documentation Consolidation (24 books total at this point): Source for System Administration Guide: IP Services
04/12/07: Documentation Consolidation: Source for System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP), System Administration Guide: Network Services
05/24/07: Man Page Consolidation: Source for third set of 622 man pages (total: 3768)
06/21/07: Man Page Consolidation: Source for fourth set of 306 man pages (total: 4074)
06/26/07: ON Test: Source for the ZFS Test Suite
06/27/07: Open HA Cluster: Sun Cluster Agents (data services) Source Code
06/27/07: ON Test: Source for Common Test Infrastructure (CTI) for the Test Environment Toolkit (TET), iSCSI Test Suite
06/29/07: Documentation Consolidation (28 books total): Source for Memory Thread Placement and Optimization Developer’s Guide, Solaris Modular Debugger Guide
07/05/07: Open HA Cluster: Globalization Source Code for the Solaris Cluster Agents
07/20/07: ON Test: Source for the Sharemgr Test Suite
08/03/07: Documentation Consolidation (31 books total): Source for Solaris Express Developer Edition Release Notes, Solaris Express Developer Edition What’s New, Solaris Express Package List
09/04/07: Documentation Consolidation (34 books total): Source for Solaris Express Developer Edition Installation Guide: Laptop Installations, Solaris Express Installation Guide: Network-Based Installations, Solaris Express Installation Guide: Solaris Live Upgrade and Upgrade Planning
09/21/07: ON Test: Source for Share Management Test Suite, Kerberos Test Tools (krb5tools)
09/24/07: Man Page Consolidation: Source for fifth set of 87 man pages (total: 4161)
09/28/07: Website: Source for Portal Application Code
10/18/07: Self-Service Testing: OpenSolaris Self-Service Testing application available and ready for use by OpenSolaris contributors
12/04/07: Open HA Cluster: Sun Cluster Geographic Edition product Source Code
12/21/07: Man Page Consolidation: Source for 17 additional man pages (total: 4278)
2008
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01/25/08: Man Page Consolidation: Source for 21 additional man pages (total: 4299)
02/12/08: Documentation Consolidation (36 books total): Source for Solaris CIFS Administration Guide, System Administration Guide: Solaris Printing
03/24/08: ON Test: Source for Secure by Default (SBD) Test Suite, Key Management Framework (KMF) Test Suite
03/27/08: Man Page Consolidation: Source for 9 additional man pages (total: 4308)
04/24/08: ON Test: Source for the NIC Driver Test Suite
05/01/08: Documentation Consolidation (37 books total): Source for System Administration Guide: Devices and File Systems
05/29/08: Open HA Cluster: Source for Solaris Cluster Core (final source for the Solaris Cluster product)
05/30/08: ON Test: Source for FNFS (NFSv4) Test Suite, SMF Test Suite
05/30/08: Man Page Consolidation: Source for 8 additional man pages (total: 4316)
06/09/08: Documentation Consolidation (39 books total): Source for Writing Device Drivers, OpenSolaris Development Guide
06/11/08: ON Test: Source for the Storage Driver Test Suite (SDTS)
06/26/08: Man Page Consolidation: Source for 401 additional man pages (total: 4717)
10/31/08: Storage Systems Products Group: Source for the Java Technology-based Interoperability System/Software/Storage (JIST) Test Suite
11/13/08: Man Page Consolidation: Accumulated source for additional man pages over the last five months (total: 4717)
11/20/08: Solaris QE: Source for Megacli Test Suite, Virt-Install Test Suite
11/20/08: Solaris RPE: Source for the NetCat Test Suite
12/11/08: Man Page Consolidation: Source for 852 additional man pages (total: 5569 which is 95% of all the man pages in the SunOS Reference Manual)
2009
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01/30/09: Man Page Consolidation: Source for 8 additional man pages (total: 5577)
02/02/09: Solaris QE: Source for Lofi loopback file driver Test Suite, CPU Caps Test Suite
02/08/09: Solaris NAS QE: Source for Network Data Management Protocol (NDMP) NDMPCOPY test tool, NDMP protocol Test Suite
02/26/09: Documentation Consolidation (43 books total): Source for Image Packaging System Guide, Getting Started With OpenSolaris, Managing Boot Environments, OpenSolaris Automated Installer Guide, OpenSolaris Distribution Constructor Guide
03/30/09: Man Page Consolidation: Source for 16 additional man pages (total: 5593)
05/29/09: Man Page Consolidation: Source for 44 additional man pages (total: 5637)
06/18/09: Solaris NAS QE: Source for CIFS Client Test Suite
06/18/09: Solaris QE: Source for Wifi Driver Test Suite, Fwflash Test Suite, NFSGEN and NFS Loadstress Test Suites
06/18/09: Services: Source for Diskomizer Test Suite (program for testing storage systems and APIs under extreme load)
07/16/09: Man Page Consolidation: Source for 17 additional man pages (total: 5654)
09/22/09: Solaris QE: Source for COMSTAR Test Suite
10/05/09: Man Page Consolidation: Source update after technology removed from source hierarchy (total: 5648)
10/28/09: X Consolidation: Read only Mercurial clone of the consolidation gate available OS org.
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