Best Free Windows Admin Tools

1. Wireshark – Powerful network analyzer 
2. Remote Desktop Manager – manage remote connections 
3. UBCD4Win – Ultimate Boot CD for Windows, a comprehensive rescue tool 
4. Specops Command – PowerShell meets Group Policy 
5. Desktop Central Free Windows Tools – 10 admin utilities 
6. BartPE – A Windows PE-based rescue platform 
7. Process Hacker – a mighty Task Manager and Process Explorer alternative 
8. Trinity Rescue Kit (TRK) – recover Windows using Linux 
9. GPOExIm – Manage Group Policy Objects 
10. WuInstall – install Windows updates using a command line script
11. MobaXterm – The multitab Unix browser for Windows 
12. AnVir Task Manager Free 
13. NirCmd – Swiss army knife for the command prompt 
14. SolarWinds Advanced Subnet Calculator – IP subnet calculation made easy 
15. NetWrix AD Object Restore Wizard – Create Active Directory snapshots 
16. Quest Object Restore for Active Directory – Undelete AD objects 
17. XIA Configuration Server – inventory and technical documentation 
18. ADManager Plus – Active Directory reports and monitoring 
19. SpecOps Gpupdate – WOL, gpupdate, remote restart 
20. Process Explorer – a better Task Manager 
21. Sysinternals Suite – Troubleshooting utilities 
22. Robocopy – Mirror folders 
23. SuRun – run programs with local admin rights 
24. TCPView – displays active TCP and UDP connections 
25. EventSentry Light – Real-time event log monitoring 
26. Live Maps for Microsoft Operations Manager 
27. Spiceworks – Network management 
28. Process Monitor – view file system, registry, and network activity 
29. NetWrix Active Directory Change Reporter 
30. Terminals – A multi-tabbed RDP client 
31. SolarWinds Real-Time NetFlow Analyzer 
32. NetWrix Password Expiration Notifier 
33. Revo Uninstaller – free PCs from junk 
34. WMI Asset Logger – Gather computer information 
35. TweakUAC – Turn off Vista UAC quickly 
36. FlexTK Express – Advanced File Management Toolkit 
37. Symantec NUAC – a UAC extension for Windows Vista 
38. export.exe – redirect stdout output into environment variables 
39. EventTracker PULSE – a search engine for log data 
40. GFI LANguard – Network Security Scanner 
41. Active Directory Reporting Tool – quick overview of user states 
42. AutoRuns – Comprehensive auto startup monitor 
43. Network Monitor – a free network protocol analyzer 
44. JDiskReport – displays disk space consumption 
45. Hyper-V Monitor Gadget for the Windows Vista sidebar 
46. AdvancedRemoteInfo – gather information remotely from Windows PCs 
47. NetWrix Disk Space Monitor 
48. The Dude – Map networks and monitor services 
49. CoreConfigurator – A GUI for Server Core 
50. ExInsight – Monitoring and statistics for Microsoft Exchange
51. EndPointScan – Scan your network for devices 
52. NTop-XTRA – shows network usage 
53. VirtualIQ – Manage Hyper-V environments 
54. Lansweeper – Hardware and software inventory for Windows 
55. MobaSSH – SSH server for Windows 
56. locate32 – Find files 
57. Netcat – Swiss army knife for network troubleshooting 
58. NetWrix Inactive Users Tracker 
59. Sequoia View – Visualize occupied hard disk space 
60. ShareWatch – See connected users and open files
61. AD Query – Search Active Directory 
62. Secunia PSI – Scan for software vulnerabilities 
63. Steel Run As – Let standard users execute with administrator rights 
64. Servers Alive – A Monitoring too
65. smartmontools – Control and monitor storage systems 
66. Belarc Advisor – builds a profile of your PC 
67. NetLimiter Monitor – displays transfer rates of processes 
68. HashCalc – compute hash/checksums and HMACs 
69. Treesize Free – Shows size of folder and subfolders
70. ManagePC – A inventory tool
71. GPMC PowerShell Cmdlets 
72. GImageX – a GUI for ImageX 
73. VHD Resizer – Shrink or Expand a Hyper-V VHD
74. Wizmo – control power saving functions in scripts
75. Virustotal – Analyze suspicious files
76. SoftPerfect Network Scanner – network scanning for Windows
77. ESXi Configurator Utility – backup and update VMware ESXi
78. ADModify.NET – modify multiple user accounts in Active Directory
79. PowerTerm WebConnect for Windows Server 2008
80. Server Core Configurator – script-based Windows 2008 Server Core set up
81. PC Wizard 2008 – a system information and benchmark tool
82. WIM2VHD – Convert a WIM image to a VHD image
83. VMware DiskMount GUI – Mount VMDK files 
84. Hyper-V VM Mover
85. Change Analysis Diagnostic Tool for Windows XP
86. ADRestore.NET – the GUI version of ADRestore
87. Passgen – Set unique administrator passwords on multiple machines
88. Simple Search – An extension for Microsoft Network Monitor
89. Top Users Expert – Analyze bandwidth consumption with Network Monitor
90. NetWorx – Network traffic monitor and network usage reporting
91. PacketTrap pt360 ToolSuite – network management
92. Nmap + Zenmap – Network scanner with Windows GUI 
93. Sysinternals ShellRunas – run programs as different user
94. WinDirStat – Query disk usage
95. Spotlight on Windows – Monitor Windows servers 
96. VistaBootPro – manage boot configuration with a GUI tool
97. 3D Traceroute – displays traceroute information in 3D
98. spacemonger v1.4 – Keep track of the free space
99. Core Configuration Console (CCC) – basic Server Core setup
100. NetWrix Services Monitor – Restart failing Windows services
101. eToolz – GUI for ping, traceroute, WHOIS and more
102. Remotely Enable Remote Desktop
103. SuperScan – an easy-to-use udp/tcp port scanner
104. Netsetman – Switch network settings
105. compname.exe – query and rename computers
106. console – Multi-tabbed command shell enhancement
107. PlacesBar Editor – Configure the dialog places bar
108. Smart UAC – disable UAC prompts for particular programs
109. NetWrix File Server Change Reporter
110. EasyBCD – a GUI bootloader configuration tool for Vista and Windows 7 
111. SolarWinds IP Address Tracker – Manage IP addresses
112. Windows Installer Clean Up – Resolve installation problems 
113. SolarWinds Exchange Monitor 
114. Logparser – Query text-based data
115. RunAsAdmin – Run with administrative rights 
116. Iometer – measure disk performance
117. PocketPutty – SSH client for Windows Mobile
118. DELTACOPY – Incremental backup program
119. DocLock – password encryption tool for Windows Mobile
120. Ultimate Windows Tweaker – Tweak Windows Vista
121. SolarWinds VM Monitor – Get X-Ray insight into your ESX Servers 
122. OpenedFilesView – view and unlock opened files 
123. VHD tool – Create, convert, and extend a VHD quickly
124. DreamSys Server Monitor – Easy server monitoring
125. IT Environment Health Scanner – Identify Active Directory problems
126. Necromancers Dos Navigator (NDN) – A file explorer
127. Detect Intel and AMD Hyper-V compatibility
128. Group Policy Refresh PowerShell Cmdlet
129. NT EventLog Explorer – retrieves event log information
130. Vmdk2Vhd – Convert VMware VMDK to Hyper-V VHD
131. Defraggler – Defrag individual files and folders
132. fs guard – monitor services and directories
133. TCP Analyzer – Statistical Analysis of TCP connections in Network Monitor
134. SpeedFan – CPU and hard disk temperature monitoring 
135. PowerGUI – Create PowerShell scripts with a GUI 
136. Edgemeal Get and Set CPU Affinity 
137. CurrPorts – displays detailed info about open TCP/IP ports 
138. mst IsUsedBy – check what process uses a certain file 
139. Script Elevation PowerToys – elevate PowerShell 
140. Specops Password Policy Basic – Fine-Grained Password Policies
141. Windows Mobile IP Utility – check IP connections 
142. Delbyown – Delete, copy or list files by owner 
143. AccessEnum – displays directory and registry permissions 
144. AdapterWatch – comprehensive info about network adapters 
145. IPNetInfo – get all information about an IP address 
146. Active@ Kill Disk – hard driver eraser 
147. MF Shutdown Manager – Schedule shutdowns, restarts and wakeups 
148. RegAlyzer – a nifty free Registry editor 
149. Compatibility Administrator – Configure legacy apps for Vista 
150. EMSA Register DLL Tool – Register programs with a GUI 
151. FREEping – quick and dirty monitoring
152. GiPo@FileUtilities – monitor directory changes, mount folders, and more