Short list of important mmc plugins

My most used are…

Disk Management diskmgmt.msc
Local Users & Groups lusrmgr.msc
Event Viewer eventvwr.msc
Active Directory Users & Computers dsa.msc
The full list after the jump

Application Server appsrv.msc
Authorization Manager azman.msc
Certificates snap-in certmgr.msc
Certificate Services certsrv.msc
Certificate Templates certtmpl.msc
Indexing Service ciadv.msc
Computer Management compmgmt.msc
Domain Controller Security Policy dcpol.msc
Device Manager devmgmt.msc
Disk Defragmenter dfrg.msc
Distributed File System dfsgui.msc
DHCP Manager dhcpmgmt.msc
Disk Management diskmgmt.msc
DNS Manager dnsmgmt.msc
Active Directory Domains & Trusts domain.msc
Domain Security Policy dompol.msc
Active Directory Users & Computers dsa.msc
Active Directory Sites & Services dssite.msc
Event Viewer eventvwr.msc
Fax Service Manager fxsadmin.msc
File Server Management filesvr.msc
Shared Folders fsmgmt.msc
Group Policy Editor gpedit.msc
Internet Authentication Service ias.msc
Internet Information Services iis.msc
Local Users & Groups lusrmgr.msc
Removable Storage Manager ntmsmgr.msc
Removable Storage Operator Requests ntmsoprq.msc
Performance Monitor perfmon.msc
Routing and Remote Access rrasmgmt.msc
Resultant Set of Policy rsop.msc
Local Security Policy secpol.msc
Services Configuration services.msc
Telephony tapimgmt.msc
Terminal Services tscc.msc
Remote Desktop tsmmc.msc
Windows Management Instrumentation wmimgmt.msc
This is how I got the list (i.e. a quick AWK tip)
cat msc.txt | awk -F" - "  '{ OFS = "\t"; print "$2""$1"}'