I've just bought a new 4GB USB thumb drive and I'm trying to decide what to put on it. I'm thinking about one of the webserver on a stick packages, a C/C++ IDE (leaning toward Code::Blocks; had Dev-C++ on my old USB drive) and Python.
What development related tools do you carry around with you on yours?
Update
I've added categories.
Code::Blocks Open source, cross platform C/C++ IDE
Codelite -- Open-source, cross platform C/C++ IDE
Eclipse -- Open-source, cross platform Java IDE
NetBeans -- Open-source, cross platform Java IDE
JCreator -- Java IDE
MSVC6 -- Microsoft's pre-.NET C/C++ environment
Portable Python -- Interpreter for the Python programming language
Strawberry Perl -- "A 100% Open Source CPAN-capable Perl for Windows® computer that works exactly the same as Perl everywhere else."
Py3k -- Newest version of the Python programming language
Stackless Python
Lua -- Scripting language
MinGW -- Sort of a Windows port of GCC
Notepad++ (after so many recommendations, I had to try it)
UltraEdit -- "text, hex, HTML, PHP, Java, Javascript, Perl, and programmer's editor."
VIM -- "highly configurable text editor built to enable efficient text editing"
HEdit -- Hex editor
XVI32 (Hex Editor)
e text editor -- "The Power of Textmate on Windows"
Intype text editor -- Code editor for Windows
ConTEXT -- Code and text editor
Editpad Pro -- "powerful and versatile text editor or word processor."
Dependency Walker -- Allows you to see what DLLs a program or DLL depends on and what functions they export.
Reflector -- Allows you to look into and decompile .Net assemblies
Spy++
DbWin32 -- Lets you see Windows debug and trace messages
DebugView -- Lets you see Windows debug and trace messages
Firefox Portable (with Firebug)
OperaUSB -- Web browser
XamppLite -- Package that includes Apache, PHP, MySQL, phpMyAdmin, OpenSSL & SQLite
PuTTY -- telnet and SSH client
Wireshark -- network protocol analyzer (packet sniffer)
WinSCP -- SFTP, FTP and SCP client for Windows
SourceGear DiffMerge -- Compare two files side by side and merge if needed.
WinDiff -- File comparison tool
Winmerge -- "Open Source differencing and merging tool for Windows."
GNU Utilities for Win32 -- Windows version of several Unix/Linux tools
Cygwin -- Port of a Unix type environment to Windows
PowerGREP -- GREP tool
NUnit -- Unit testing for .NET
TestDriven.NET -- Easily run your unit tests from Visual Studio
AnkSVN -- Subversion plugin for Visual Studio
LINQPad -- Tool to interactively develop Linq queries.
Expresso -- Regular Expression tool
RegexBuddy -- Regular Expression tool
The Sysinterals Suite (includes DebugView, Process Explorer, & more)
WinZip
DosHere
7-zip -- Open source file archiver
Scrollbar fix for VB6
puretext -- Paste w/ formatting removed
VirtualBox -- Open source virtualization product.