Windows Software I can't live without

• Secunia PSI
• Sysinternals Suite (and the live version)
• ILSpy
• 7-Zip
• Fiddler
• Wireshark
• KeePass
• Subversion
• TortoiseSVN
• mdbg (.NET 3.5 and earlier), and mdbg (.NET 4.0)
• Virtual CloneDrive

Honourable mention:

• Microsoft Security Essentials
• Microsoft Baseline Security Analyzer
• Putty
• Speccy
• Truecrypt
• µTorrent
• XVI32
• Dependency Walker
• Managed Stack Explorer
• PerfView
• Remote Desktop Connection Manager
• Foxit PDF Reader
• PowerShell Community Extensions
• File Checksum Integrity Verifier (fciv)
• Windows System State Analyser x64 or x86

Visual Studio 2012:

• Visual Studio 2012 Update 1 (should be downloaded automatically from within VS 2012)
• ASP.NET and Web Tools 2012.2
• ReSharper 7.1, if installed using these steps:
  
  1. Set VS keyboard shortcuts to C# and reset to defaults.
  2. Set R# keyboard shortcuts to Visual Studio style.
  3. Set The following R# options:
     • Code Editing -> C# -> Formatting Style -> Line Breaks and Wrapping -> Line Wrapping -> Wrap long lines: untick
     • Code Editing -> C# -> Formatting Style -> Other -> Modifiers -> Use explicit private modifier: untick
     • Code Editing -> C# -> Formatting Style -> Other -> Modifiers -> Use explicit internal modifier: untick
     • Code Editing -> C# -> Formatting Style -> Other -> Align Multiline Constructs -> Array, object and collection initializer: untick
     • Tools -> External Sources -> Navigation to Sources: tick all boxes
  4. Run the following code in the Package Manager Console:

     ($DTE.Commands | ? { $_.Name -eq 'ReSharper.ReSharper_DuplicateText' }).Bindings = @()
     ($DTE.Commands | ? { $_.Name -eq 'Edit.PasteParameterTip' }).Bindings = @()
     ($DTE.Commands | ? { $_.Name -eq 'ReSharper.ReSharper_IntroduceField' }).Bindings = @()