For most of Microsoft products and technologies there's somewhere a list of all (or most recent) updates (patches or hotfixes) that were made publicly available for customers. Usually such a list is published as article in Microsoft Support Knowledge Base or TechNet Library. Those “official” Microsoft web properties have lengthy publishing curve, so those lists sometimes become out of date. That is why often there are also “unofficial” versions of those lists maintained by the community and published in blogs or TechNet Wiki.

This article is aimed to serve as a central place to accumulate the “list of lists”. Use it as a starting point to look for the list of updates for a particular given Microsoft product or technology you're currently interested in.

Product or technology Version Official list Community list
SQL Server all supported KB957826: Where to find information about the latest SQL Server builds n/a
SQL Server 2008

For SPs — KB968382: How to obtain the latest service pack for SQL Server 2008

For SP0 — KB956909: The SQL Server 2008 builds that were released after SQL Server 2008 was released

For SP1 — KB970365 The SQL Server 2008 builds that were released after SQL Server 2008 Service Pack 1 was released

For SP2 — KB2402659: The SQL Server 2008 builds that were released after SQL Server 2008 Service Pack 2 was released

For SP3 — KB2629969: SQL Server 2008 builds that were released after SQL Server 2008 SP3 was released

n/a
SQL Server 2008 R2

For SPs — KB2527041: How to obtain the latest service pack for SQL Server 2008 R2

For SP0 — KB981356: The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 was released

For SP1 — KB2567616: The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 Service Pack 1 was released

For SP2 — KB2730301: The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 Service Pack 2 was released

(Note that the final build is SP3—and there are no Cumulative Updates planned for it.)

n/a
SQL Server 2012

For SPs — KB2755533: How to obtain the latest service pack for SQL Server 2012

For SP0 — KB2692828: The SQL Server 2012 builds that were released after SQL Server 2012 was released

For SP1 — KB2772858: The SQL Server 2012 builds that were released after SQL Server 2012 Service Pack 1 was released

For SP2 — KB2983249: SQL Server 2012 SP2 build versions

For SP3 — KB3133750: SQL Server 2012 SP3 build versions

n/a
SQL Server 2014

For SPs — KB2958069: How to obtain the latest service pack for SQL Server 2014

For SP0 and SP1 — KB2936603: SQL Server 2014 build versions

n/a
Hyper-V Windows Server 2008 R2 Hyper-V Update List for Windows Server 2008 R2 (migrated to the Wiki on August 2011. See the link on the right) Option 1: Hyper-V: Update List for Windows Server 2008 R2 Option 2: Comments (aka Annotations) below the Official table (see the link on the left).
Hyper-V Windows Server 2012 n/a Hyper-V: Update List for Windows Server 2012
Hyper-V Windows Server 2012 R2

KB3135020: Recommended hotfixes, updates, and known solutions for Windows Server 2012 R2 Hyper-V environments

Hyper-V: Update List for Windows Server 2012 R2
Hyper-V Network Virtualization (HNV) Windows Server 2012 R2

KB2974503: Recommended hotfixes, updates, and known solutions for Windows Server 2012 R2 Hyper-V Network Virtualization (HNV) environments

n/a 

Office (including Server products) All recent versions

Option 1: KB953878: Cumulative updates are available from the Microsoft Office team to fix reported problems

Option 2: Update Center for Microsoft Office, Office Servers, and Related Products

n/a
Access All recent versions

Options 1 and 2: contained in Office update lists (see above)

Option 3: KB2692648: How to install the latest applicable updates for Microsoft Access

n/a
Outlook All recent versions

Options 1 and 2: contained in Office update lists (see above)

Option 3: KB2625547: How to install the latest applicable updates for Microsoft Outlook (US English only)

n/a
Windows Internet Explorer (IE) All versions KB969393: Information about Internet Explorer versions (Includes not updates but major versions only) n/a
File Services Windows Server 2008 and Windows Server 2008 R2 KB2473205: List of currently available hotfixes for the File Services technologies in Windows Server 2008 and in Windows Server 2008 R2 n/a
File Services Windows Server 2012 and in Windows Server 2012 R2  KB2899011: List of currently available hotfixes for the File Services technologies in Windows Server 2012 and in Windows Server 2012 R2 n/a 
DFS-R and DFS-N Windows Server 2008 and Windows Server 2008 R2 KB968429: List of currently available hotfixes for Distributed File System (DFS) technologies in Windows Server 2008 and in Windows Server 2008 R2 n/a
DFS-R and DFS-N Windows Server 2012 and Windows Server 2012 R2 KB2951262: List of currently available hotfixes for Distributed File System (DFS) technologies in Windows Server 2012 and Windows Server 2012 R2 n/a
Windows Management Instrumentation (WMI) Windows Server 2008 R2 KB2591403: Suggested hotfixes for WMI related issue on Windows platforms Option 1: List of WMI-Related Hotfixes for Windows 7 and Windows Server 2008 R2 Option 2: Suggested hotfixes for WMI related issue on Windows platforms
Failover Cluster Windows Server 2008 R2 SP1 KB2545685: Recommended hotfixes and updates for Windows Server 2008 R2 SP1 Failover Clusters List of Cluster hotfixes for Windows Server 2008 R2
Failover Cluster Windows Server 2012 KB2784261: Recommended hotfixes and updates for Windows Server 2012-based Failover Clusters List of Failover Cluster Hotfixes for Windows Server 2012
Failover Cluster Windows Server 2012 R2 KB2920151: Recommended hotfixes and updates for Windows Server 2012 R2-based failover clusters List of Failover Cluster related hotfixes post RTM for Windows Server 2012 R2 RTM
Exchange Server All recent versions Exchange Server Build Numbers and Release Dates Exchange Server and Update Rollups Builds Numbers
Forefront Identity Manager All versions n/a Microsoft's Identity Software: Public Release Build Versions
Forefront Threat Management Gateway (TMG) 2010 n/a List of Build Numbers for Microsoft Forefront Threat Management Gateway (TMG)
Forefront Unified Access Gateway (UAG) 2010 n/a Types of Updates Available for UAG
System Center Configuration Manager (ConfigMgr) 2007 SP2 n/a List of Public KB Articles and Hotfixes for Configuration Manager 2007 SP 2
System Center Configuration Manager (ConfigMgr) 2012 n/a List of Public Microsoft Support Knowledge Base (KB) Articles for System Center 2012 Configuration Manager (ConfigMgr 2012)
System Center Data Protection Manager (DPM) All recent versions n/a List of Build Numbers for System Center Data Protection Manager (DPM)
System Center Operations Manager (OpsMgr) 2007 R2 KB2453149: List of all cumulative update releases for System Center Operations Manager 2007 R2 n/a
System Center Operations Manager (OpsMgr) System Center 2012 and System Center 2012 SP1 KB2906925: Update rollup packages for System Center 2012 Operations Manager n/a
System Center Service Manager All recent versions n/a List of Build Numbers for System Center Service Manager
System Center Virtual Machine Manager (VMM) 2008 R2 KB2397711: Recommended hotfixes for System Center Virtual Machine Manager 2008 R2 List of Virtual Machine Manager (VMM) Updates Note: for an updating list of all VMM-related KB articles (not only hotfixes) you can watch for the System Center Virtual Machine Manager team blog
System Center Virtual Machine Manager (VMM) 2012 KB2724596: Recommended hotfixes for Microsoft System Center 2012 Virtual Machine Manager

For SP0 — [[VMM 2012: List of Public Microsoft Support Knowledge Base Articles]]

For SP1 — [[System Center 2012 VMM SP 1: List of Microsoft Support Knowledge Base Articles]]

For R2 — [[System Center Virtual Machine Manager 2012 R2: List of Microsoft Support Knowledge Base Articles]] 

System Center Virtual Machine Manager (VMM) All recent versions KB2627355: How to determine the version of Virtual Machine Manager List of Build Numbers for System Center Virtual Machine Manager
System Center App Controller  2012 n/a List of Build Numbers for System Center App Controller
Group Policy Windows XP and above KB2590914: Recommended Updates for Group Policy in Windows Client and Server Products n/a
Remote Desktop Services (RDS) Windows Server 2008 R2 KB2601888: Available Updates for Remote Desktop Services (Terminal Services) in Windows Server 2008 R2 n/a
HTTP protocol stack Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2 KB2624534: List of currently available hotfixes for Http.sys in Windows Vista, in Windows Server 2008, in Windows 7, and in Windows Server 2008 R2 n/a
Windows Installer 4.5 and 5.0 KB2625845: List of currently available hotfixes for Windows Installer 4.5 and Windows Installer 5.0 n/a
Microsoft Application Virtualization (App-V) 4.5 and 4.6 KB2585266: Current list of App-V 4.5 and 4.6 file versions n/a
Microsoft Application Virtualization (App-V) 5.0 KB2900621: Current list of App-V 5.0 file versions n/a