There are many web based code editors out there, but getting by free and good ones is not that easy. After searching ,I found this list on SmashingApps website ,they are some editors that also recognize as IDEs .If your work get involved with coding ,but in sometimes ,you have to use another computer or need to work when you are far away from your home or office ,they are good replicas for you.

Kodingen

Kodingen is an Online Development Environment including Code Editor, Cloud Hosting, Database Administration, Collaboration, Web based access to file-system, Web based ftp & svn integration.

PHPanywhere

PHPanywhere is a web based free Integrated Development Environment or IDE for the PHP language, in other words it is an application that gives developers all the code editing capabilities they need to develop PHP applications online.

CodeRun Online IDE

CodeRun Studio is a cross-platform Integrated Development Environment (IDE), designed for the cloud. It enables you to easily develop, debug and deploy web applications using your browser. CodeRun Studio can be used instead or alongside your existing desktop IDE. You can upload existing code in order to test it in the cloud or for sharing with your peers.

Codeita

Codeita is a powerful, easy to use, cloud-based, web development environment.  It’s a powerful code editor, an advanced svg image editor, and an out of this world project management and collaboration tool. It allows users to code, develop, brainstorm, communicate and then publish projects and files to your web server.

Drawter

Drawter is a tool written in JavaScript and based on jQuery library. It provides you the possibility to literally draw your website’s code. It runs on every single web-browser which makes it really useful and helpful.

ecoder

ecoder is a simple, web-based code editor, which includes a file browser, file uploader, and tabbed system to allow multiple files to be edited at the same time. using this web-application developers can edit code directly online, real-time syntax highlighting is handled by textarea and keyboard short-cuts lend it the feel of a locally installed application.

ShiftEdit

ShiftEdit is an online IDE for developing PHP, Ruby, HTML, CSS and JavaScript with built-in (S)FTP.

jsFiddle

JsFiddle is a playground for web developers, a tool which may be used in many ways. One can use it as an online editor for snippets build from HTML, CSS and JavaScript. The code can then be shared with others, embedded on a blog, etc.

Using this approach, JavaScript developers can very easily isolate bugs.

ideone

Ideone is something more than a pastebin; it’s an online compiler and debugging tool which allows to compile and run code online in more than 40 programming languages.

Amy Editor

Amy Editor is the online source code and text editor. It is implemented using the text-editing control of the Fry Framework in a pure JavaScript fashion, running inside your browser.

jsdo.it

jsdo.it is a website where you can write JavaScript, HTML5, CSS in your browser, and share it with you co-authors.