Creating a list of other tools to make SharePoint Dev and Admin a little easier. All are free unless marked otherwise.
Visual Studio Development Environment Extensions
CodeRush/Refactor Tools for SharePoint Developers
Extensions to CodeRush/Refactor to assist SharePoint development.
Imtech Fields Explorer Visual Studio 2008 plugin
Quickly find the field names needed for CAML queries and controls.
SharePoint Developer Explorer
Allows editing of SharePoint content (e.g. page layouts) from within Visual Studio.
SharePoint Development Environment Modifications (SPDevMod)
Collection of STSADM extensions and plugins for Visual Studio.
IDEs (Integrated Development Environments)
Development environment with focus on SharePoint site modeling, deployment and provisioning with plenty of productivity tools. Mossquito unites the benefits of CAML and Object Model approach to site structure creation. Feature-rich UI, deployment based on compare & merge principle, DAO generator, command line for common tasks automation and more.
Network Inspection Tools
Examines the network traffic of pages as they load. Check the size of pages. Recommended for deploying public facing websites.
Firebug for Firefox
Net console provides network statistics.
Google Page Speed for Firebug for Firefox
Analyses page performance and provides network statistics.
Yahoo! YSlow for Firebug for Firefox
Analyses page performance and provides network statistics.
Can analyze all network traffic. Handy for seeing what network traffic is really flowing.
Web Service Testers
SharePoint Query Web Service Test Tool
Test tool for WSS V3's Query web service. Allows you to generate the request XML and send it to the web service.
Tests any web service (including SharePoint).
Search Test Tools
Search Commmunity Toolkit
A number of tools and code samples that have been contributed to enhance the Microsoft search experience (Microsoft Office SharePoint Server 2007 (MOSS) Search, Search Server 2008 and Search Server 2008 Express).
SharePoint Search Service Tool
Web service client that can explore the scopes and managed properties of a given SharePoint Search SSP, build queries in either Keyword or SQL Syntax, submit queries, and examine the raw web service results.
zevenseas SharePoint SearchCoder
Allows graphical building of queries and examination and testing of the SQL generated by the object model.
Object Model Viewers
MAPILab Spy for Microsoft® SharePoint
According to the vendor, it provides "Browser for examining SharePoint object model" and "Context scripts on C#"
Allows exploration of any .NET assembly, including those provided by SharePoint. Shows where and how methods and objects are used. Find feature for fields, properties, and methods.
See SharePoint farm objects, get their properties by reflection, activate/deactivate SharePoint features, add/remove event receivers, manage the recycle bin.
SharePoint object model explorer for inspecting your SharePoint environment. Can browse every site on the local farm and view every web, list, event receiver, etc... Enables the changing of properties.
Set of .NET language-based tools for creating dynamic, reusable CAML query components. Build CAML queries dynamically in code while preserving the syntactic structure of the native CAML language.
Stramit Caml Viewer 2007
Assists in the creation of CAML queries. Allows testing against your SharePoint farm.
U2U Caml Query Builder 2007
Build CAML queries and test them on a SharePoint site. User interface helps you to build queries against any list in your SharePoint farm.
Yet Another CAML Query Tool
Converts SQL-like queries into CAML.
Imtech ListInstance Generator
Generates the ListInstance based on the List Template from a particular Feature.
SharePoint 2007 Features
Large collection of SharePoint features designed for developers and administrators. Provides assistance for debugging, logs, field and content type development, publishing sites, event receivers, and many more.
SmartTools for SharePoint
Collection of SharePoint features such as What's New, Autocomplete Text Field, Enhanced Site Actions, and more.
AC's WCM Custom Commands for STSADM.EXE
STSADM extensions for publishing sites and generating content type and column features.
Imtech OCD Export
Simplifies the process of provisioning Publishing Pages by extracting existing pages to XML. The files generated allow you to wrap your Publishing Pages in a Feature.
List of almost 100 STSADM extensions that cover a variety of development and administrative tasks.
Provides a Windows UI version of the STSADM tool.
PowerShell Extensions for SharePoint
Provides functionality for working with the SPWeb object.
Extensions that assist in the use of working with the SharePoint object model from Powershell.
The SharePoint PowerShell Module (SPoshMod)
Framework for SharePoint PowerShell scripts.
LINQ to SharePoint
Provides a custom query provider for LINQ that allows the querying of SharePoint lists using LINQ syntax.
SharePoint config store
Provides the framework for using a SharePoint list for application configuration values.
SharePoint Dispose Checker Tool
Helps to check that unmanaged SharePoint objects are correctly disposed of in code.
SharePoint Tips Utility Pack
Collection of tools including recursively delete sites, create and modify lists in multiple sites at once, and push a web part to multiple sites at once.
SharePoint Cross-site Configurator
Automates the process of deploying MOSS site settings in all or selected sites in a server farm. Includes applying master pages, web titles, audit controls and expiration policies.
SharePoint Content Deployment Wizard
Allows a granular selection of content to be exported from site collections, webs, lists, folders, and list items to a .cmp file (Content Migration Package) which can be copied to other servers for import.
Performs common administrative tasks. Can backup sites, copy views between sites, bulk create sites, apply themes just to name a few functions
SharePoint Developer Bookmarklets
Great set of bookmarks to make navigating a SharePoint Web Site easier.
Test Data Generation Tools
Imtech Test Content Generator v18.104.22.168
Creating a given number of publishing pages with the desired page layout and content.
SharePoint 2007 Test Data Population Tool
Capacity planning and performance testing tool that populates data for testing SharePoint deployments.
Excellent tool that pops up in start bar with errors in ULS logs based on filters. Very handy to have running whilst developing! Quicker than notepad viewing!
Application Pool Recycle Utility
Taskbar application that allows quick recycling of application pools.
Please submit more on this page!
More to come, the community around SharePoint is great and there are so many free tools.