Most of this online tools perform simple task that could reduce fair a bit of times if you've to do it manually. I searched through my bookmark and handpicked those I think it's really handy and finally, I have this list.
Okay, Make Text is not a must-have but it’s definitely a fun tool to use. MakeText does only one thing – it generates random texts (where web designers will often use it to preview and test their designs).
STC Font Browser is a free tool that enables you to preview font styles in your browser. The tool is simple to use and it’s very helpful when you need to choose a font style.
The variable grid system is a quick way to generate an underlying CSS grid (based on 960 Grid System) for your site.
DIY Chart is a simple but yet powerful online tool that helps create interactive charts and graphs.
Bespin is a Mozilla Labs experiment on how to build an extensible Web code editor using HTML 5 technology.
This handy tool helps you create dummy text for all your layout needs.
Preview and test your web pages on leading browsers and operating systems – on demand.
Browsershots makes screenshots of your web design in different browsers. It is a free open-source online service created by Johann C. Rocholl
Carbonmade is a free online portfolio service without the hassle.
A zoomable widget for images.
Colorcombos was built to help web developers quickly select and test website color combinations.
Browse color palettes, or create your own. Adjust, mix and blend to your heart’s content.
Convenient and easy to use color scheme designer.
COLOURlovers™ is a resource that monitors and influences color trends.
CSSFly is a web 2.0 tool for easy editing websites direct and in real-time in your browser.
CleanCSS is a powerful CSS optimizer and formatter. Basically, it takes your CSS code and makes it cleaner and more concise.
CSS Typeset is an online CSS generator for text.
Curdbee is a free online billing & invoicing system.
Dabbleboard is an online collaboration application that’s centered around the whiteboard. With a new type of drawing interface that’s actually easy and fun to use, Dabbleboard gets out of your way and just lets you draw.
EmailTheWeb.com is the only web-based service that allows you to email any web page to any one.
Embedit allows for seamless embedding of files into your website.
Display content from other blogs at your website with just one simple html tag
Five second tests help you easily identify the most prominent elements of your user interfaces.
Font Burner is a website enhancement tool that makes it easy for you to add new fonts to your website.
Fontstruct allows you to build, download and share custom fonts.
Gazup! is the leading website for social file mirroring online. By using Gazup!, you’ll be able to upload files to multiple file hosts in one go thus saving you time and bandwidth.
This is online image converter website for free. It supports over 100 major image formats.
Google Analytics is the enterprise-class web analytics solution that gives you rich insights into your website traffic and marketing effectiveness.
HTML-ipsum generates dummy HTML code to demonstrate various features, including lists and tables.
IconFinder allows you to search through 115,827 icons or browse 276 icon sets.
Iconza is a collection of free icons that can be colored and reduced in size to your taste.
Lazy to code a special character in HTML code? Well, you should. Because with CopyPaste Character the only key that you need to type is “ctrl + c” and “ctrl + v”.
iPlotz allows you to rapidly create clickable, navigable mockups and wireframes for prototyping websites and software applications.
JsUnit is a Unit Testing framework for client-side (in-browser) JavaScript.
Designed specifically for web developers, SpringLoops enables groups to code together and safely share code between each other. It ultimately saves time by eradicating repeated activities performed on a day-to-day basis. It even backs up old versions of code, allowing users to quickly undo poor decisions.
Kuler is a web-hosted application for generating color themes that can inspire any project.
Load Impact is an online load testing service that lets you load test your website with just a few mouse clicks.
Nozbe is a great time and project management web app suitable for individuals and small teams. It lets users arrange their tasks into projects, focus on what needs to be done next, group tasks by context (home, office, phone etc) to maximise productivity, and collaborate with a team.
Lorem Ipsum is simply dummy text of the printing and typesetting industry.
myFontbook is a free and easy way to browse your font collection.
WuFoo is a HTML form builder helps you create contact forms, online surveys, and invitations so you can collect the data, registrations and online payments you need without writing a single line of code.
net2ftp is an easy to use web based FTP client.
Photoshop.com is an online photo editing and sharing site.
pForm allows you to create a simple HTML form in a matter of seconds.
PHPAnywhere is an online PHP editor that allows you to edit PHP code from anywhere.
Pingdom allows you to monitor your site’s uptime and responsiveness.
Posterous lets you post things online fast using email. You email us at post@posterous.com and we reply instantly with your new posterous blog.
Icebrrg helps make all kind of forms – contact forms, registration Forms, surveys, application forms and personal inventoriestracking forms.
PX to EM conversion made simple.
Sikbox allows you to easily get code for a live search on your site.
Splashup, formerly Fauxto, is a powerful editing tool and photo manager.
Templatr allows you to quickly generate rough and dirty web templates.
TestEverything allows you to do just that…test your site with a variety of tools, all in one.
Typechart lets you flip through, preview and compare web typography while retrieving the CSS.
The Typetester is an online application for comparison of the fonts for the screen.
Verb is a user focused task management and sharing application.
ViewLikeUs allows you to view your site in various resolutions.
The w3c validator allows you to valide your markup to ensure properly formed code.
Web Form Factory is an open source web form generator which automatically generates the necessary backend code to tie your form to a database.
WhatTheFont is a font identification tool that identifies fonts based upon uploaded images.
Xenocode, now BrowserSandbox allows you to package your applications in standalone virtual executables that run instantly on any desktop.
Test the look and functionality of any website on multiple browsers and operating systems.
Whether you want a short URL or something big, Domainr helps you explore them all.
PicMarkr lets you to add custom watermark (image or text) to your images online and free. It is useful when you need to protect your copyrights or if you want to add commentsto your photos.
Picnik makes your photos fabulous with easy to use yet powerful editing tools.
Pict is a free and easy to use online image hoster.
Pixlr lets you quickly edit your photos and do quick fixes without any hassle.
Show Document is a Net Meeting platform for instantaneous and spontaneous online meetings where people can work together on the same document at the same time.
Tynt Insight tracks what’s being copied off your site and automatically adds a link back to your content with every paste.
Central Desktop offers users an online workspace where they can share files and documents, manage tasks and discuss projects in a group without the need for constant email writing and checking. It’s free to use in a limited capacity.