Browser Shots

Browsershots makes screenshots of your web design in different browsers and in different OS platforms. But be patient! It can take a few hours to complete.
Visit site »

Google Analytics

Apart from giving you detailed statistics about your visitors, Google Analytics has a Website Optimizer that helps you find out which page designs, headlines, and graphics convert the most visitors.
Visit site »

ClickTale

ClickTale reveals what visitors are doing inside your webpage (mouse gestures and clicks). Also scrolling heatmaps show where visitors look and how far down they scroll.
Visit site »

CrazyEgg

Lets you visualize where your visitors click on your webpage.
Visit site »

Conceptshare – Online collaboration Tool

ConceptShare allows you to setup secure online workspaces for sharing designs, documents and video and invite others to review, comment and give contextual feedback anytime and anywhere without a meeting.
Visit site »

Cozimo – Collaborative Tool

With Cozimo you can collaborate and review images and videos in real-time. Get feedback from clients and colleagues instantly.
Visit site »

Stixy

Stixy is online white board to easily organize and share photos, projects at work, files… I have been using this application for a while but I always found it very busy and messy. It is far from being as clean and polish as Conceptshare in my opinion.
Visit site »

ReviewBasics – Collaborative Tool

Similar to Conceptshare and Cozimo. This is not my favorite collaborative tool but they recently improved the UI that makes it pretty pleasant to use now.
Visit site »

Pingdom – online tool

Test your webpage to see the total time it takes to load the page including all objects (images, CSS, JavaScripts, RSS, Flash and frames/iframes). It mimics the way a page is loaded in a web browser.
Visit site »

Color Explorer

With the colorful toolbox at ColorExplorer you can easily create, manage, and explore color palettes for use in web designs, desktop publishing, or any other graphic design process.
Visit site »

Color Blender

Free online tool for color matching and palette design.
Visit site »

280 Slides

Create beautiful presentations, access them from anywhere, and share them with the world.
Visit site »

HTML Playground

HTML + CSS reference by example. Select a HTML tag from a list, modify the code if you want and see the result.
Visit site »

QuarkBase

Quarkbase is a free tool to find complete information about a website. It gives information such as Google and Alexa ranks, top countries, popular pages, traffic rank, social popularity…
Visit site »

Test Everything!

Test Everything! allows you to test your website with over 100 tools.
Visit site »

SEOmoz – Trifecta

Measures metrics to estimate the relative popularity and importance of Page, Blog or Domain.
Visit site » (SEOmoz – all the tools »)

SEO Centro – online tools

SEOcentro has some nice online SEO tools such as Meta Tag Analyzer, PageRank Check Tool, Link Popularity Tool, Search Engine Saturation, Keyword Suggestion Tool…
Visit site »

Domainr

Domainr helps you explore all the domain names. A green square appears next to the suggested domain name when available. A great tool to help you find an original domain name for you next project.
Visit site »

CopyScape

Website Plagiarism search. Search for copies of your page on the Web.
Visit site »

DabbleBoard

Dabbleboard is a powerful online whiteboard that’s actually easy and fun to use. Draw with flexible tools. Reuse previously-made drawings. Share and collaborate in real-time.
Visit site »

WhatTheFont

Font recognition system. Upload a scanned image of the font and instantly find the closest matches.
Visit site »

Online Image Optimizer- GIF, JPG, and PNG

Image Optimizer lets you easily optimize your gifs, animated gifs, jpgs, and pngs, so they load as fast as possible on your site.
Visit site »

WebSnapr 2.0

websnapr lets you capture screenshots of (almost) any web page.
Visit site »

Favicon Generator

Online tool to easily create a favicon for your site.
Visit site »

CollabTRACK

A free, flexible, easy to use web-based project tracker for web designers and their clients.
Visit site »

Project2Manage

Project2Manage is a great tool to keep you organized. It has a ton of features that allow you to create, manage and complete projects in your day to day activities as well as your professional life.
Visit site »

FreshBooks

Fast and simple invoicing and time tracking services that help you manage your business and invoice your clients.
Visit site »

Remember The Milk

Manage tasks quickly and easily and receive reminders via email, SMS, and instant messenger (AIM, Gadu-Gadu, Google Talk, ICQ, Jabber, MSN, Skype and Yahoo! are all supported).
Visit site »

XML-Sitemaps

Visit site »

YUI: CSS Grid Builder

CSS Grid Builder is a simple interface for Grids customization.
Visit site »

More please!

What? Not enough? Errr… Okay, then, check tlbox. This is an online tool that lets you collect interesting links and online tools for web designers, programmers and system administrators. You might find something interesting there. Visit site »

What free Web-based tool do you use? Share it with us in the comments!