!![DirXML]

!![Microsoft Identity Management Product Line]

!![Oracle IDM]
[Oracle] has acquired many products to use with their [Oracle IDM] product lines.

!![SUN IDM]
[Sun Microsystems] has made similar acquisitions (e.g., Waveset for provisioning).  The list is by no means exhaustive.
!![IBM IDM]
IBM has done the same thing, with its acquisition of DASCOM (WAM) in 1999, Access360 (provisioning) and Metamerge (metadirectory) in 2002. 

!![Computer Associates]

!! [ActivIdentity]
ActivCard (now ActivIdentity) acquired Protocom to enhance its existing capabilities.

!! [Passlogix]
Passlogix OEMs its v-Go eSSO product to Oracle, Sun, and IBM.  The Citrix product has a residual amount of Passlogix code in it.  Whoever picks up Passlogix has the opportunity to shake up the market and irritate its competitors.

!! [Centrify]

!! [Imprivata|http://www.centrify.com/]
Claiming to be "the largest provider of healthcare single sign-on technology," Imprivata has a Global Healthcare Division complete with a chief medical officer (Dr. Barry Chaiken, currently head of The Healthcare Information and Management Systems Barry Society - HIMSS).

!![Courion]

!![Hitachi ID Systems]
At the 2008 RSA conference, Hitachi announced the acquisition of majority shares in M-Tech which was best known for P-Synch, their password management offering.
!![SAP]
SAP acquired MaXware.

!! [DirX Access]
[DirX] Access is the Access Management and Federation solution within the Atos [DirX] product family. These products came to the Atos portfolio as part of the Siemens SIS acquisition

!![HP OpenView Select Identity]


!! [AdNovum] – [Nevis Security Suite]
[AdNovum] is a Swiss-based software vendor. [AdNovum] support what they call “secure web interaction” with their [Nevis Security Suite]. The suite consists of various components for [WEB Access Management], including Federation support, and Web Application Firewall, authentication, user management including delegated administration and self-registration, support for digital signatures, and an administration console. All features are provided by separate components. However, these components are tightly integrated.[1]

!! More Information
There might be more information for this subject on one of the following:
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* [#1] - [Access Management and Federation|https://www.netiq.com/docrep/documents/ctn5e39lbr/kuppingercole-leadership-compass-access-management.pdf/|target='_blank'] - based on information obtained 2016-06-13-