vSphere Client Version
VMware vSphere Client v4.1 Update 1 [4.1.0-345043]
VMware vSphere Client v4.1 Update 2 [4.1.0-491557]
VMware vSphere Client v4.1 Update 3 [4.1.0-799345]
VMware vSphere Client v5.0 [5.0.0-455964]
VMware vSphere Client v5.0 Update 1 [5.0.0-623373]
VMware vSphere Client v5.0 Update 2 [5.0.0-913577]
VMware vSphere Client v5.0 Update 3 [5.0.0-1300600]
VMware vSphere Client v5.1 [5.1.0-786111]
VMware vSphere Client 5.1.0a [5.1.0-860230]
VMware vSphere Client 5.1.0b [5.1.0-941893]
VMware vSphere Client 5.1 Update 1 [5.1.0-1064113]
VMware vSphere Client 5.1 Update 1b [5.1.0-1235233]
VMware vSphere Client 5.1 Update 2 [5.1.0-11471691]
VMware vSphere Client 5.5 [5.5.0-1281650]
VMware vSphere Client 5.5 Update 1 [5.5.0-1618071]
VMware vSphere Client 5.5 Update 2 [5.5.0-1993072]
Original Source: http://www.vmwarearena.com/download-link-for-all-versions-of-vmware-vsphere-client/