I am big fan of Smashing Magazine and I was reading though it. I found really interesting article “40+ Desert Island Web Development Tools – By Cameron Chapman”. If you want to see the complete list in Smashing Magazine then Click Here. In this article I have made the compilation of list of apps that I use and list included in Smashing magazine and PortableApps.com.

For Coding:

1. Notepad++ Portable Edition is a coding application that includes all the features you’d expect in a coding app. It’s written in C++ and runs on Windows. It’s open source and was released under the GPL license. The portable edition includes all the features of the regular version. It has multi-view, supports a multi-language environment, a WYSIWYG editor, auto-complete, syntax highlighting and folding, and macro recording and playback, among its other features. It’s a great lightweight coding app. Click here to download.
2. KompoZer Portable & Nvu Portable is an easy-to use web editor packaged with a PortableApps.com launcher as a portable app. KompoZer is an unofficial bug-fix release for Nvu that fixes many of the outstanding bugs in Nvu 1.0. As Nvu is no longer updated, KompoZer is recommended. It includes a WYSIWYG editor and powerful file management. It’s aimed at users who might not be particularly technically savvy and only have a limited knowledge (or none at all) of HTML and CSS.  Click here to download KompoZer Portable. Click here to download Nvu Portable.
3. Oiko CSS Editor is a full-featured CSS, (X)HTML and XML editor in a portable format. It works on Windows 98 through XP. It’s a fairly robust editor, with an easy-to-use interface, grouped view of properties and selectors, a tree view of your CSS’s structure, and includes active preview in both IE and Mozilla browsers. Click here to download Oiko CSS Editor.

Graphics and Multimedia:

1. GIMP Portable and GIMPshop (Advance form of GIMP Portable) is a good alternative to Adobe Photoshop in a portable format. While GIMP’s user interface takes a bit of getting used to compared to other photo editing programs, it’s actually quite flexible. The portable version of GIMP has all the features of the full version, including layers and filters. It can also be extended and expanded, just like the full version. Now a days GIMPShop is geeting more popular as it is the advance form of GIMP Portable. Click here to download GIMP Portable. Click here to download GIMPshop.
2. Portable Inkscape is a portable vector graphics editing program. Inkskape has features similar to other vector graphics programs, including Illustrator, CorelDraw, and Xara X. It saves graphics in SVG (Scalable Vector Graphics) format.There is extensive documentation available for Inkscape on their website, a big plus if you’re new to using it. The portable version is only available for Mac OS X, though the full version is also available for Linux and Windows. Click here to download Portable Inkscape.
3. Fotografix is a portable graphics program that lets you both edit and create images. There are brush tools, support for custom brushes, layer and channel support (including adjustment layers and masking), and a variety of other tools included.One of Fotografix’s biggest advantages, though, is it’s tiny file size: it’s only 367KB. If you want a really lightweight and easy to use graphics editor, Fotografix might be the right choice for you. However, it’s not as robust as a program like Photoshop, so keep that in mind. Click here to download Fotografix.
4. Artweaver is a portable, freeware paint program. It lets you create sketches right from photos and includes a wide variety of brushes. It also lets you create new brushes and customize existing ones.Artweaver also supports transparency and layers, and a variety of image formats (JPG, PNG, PSD, and more). It’s expandable via plugins, too. Artweaver works on Windows 2000, XP, or Vista. Click here to download Artweaver.
5. Blender Portable is a portable version of the Blender 3D rendering program. It works with the PortableApps.com platform. The portable version includes all the features of the regular version of Blender.Blender has a range of features for rigging, modeling, animating and rendering 3D images. It has a fully customizable window layout and a non-overlaping, non-blocking UI. And it includes a built-in text editor for annotations and editing Python scripts. Click here to download Blender Portable.
6. Lightscreen Portable is a portable app that runs on Windows and lets you take screenshots of the desktop of whatever computer you’re on. It will perform five configurable actions (to capture window, screen, etc.) and each has its own hotkey. Lightscreen will save images in PNG, JPEG and common other image formats. It also has a delay function for taking screenshots. It runs as a hidden background process and is activated with one or more hotkeys. Click here to download Lightscreen Portable.
7. Portable Audacity is portable audio editing software for Mac OS X. Audacity has tons of features, including the ability to record live audio, edit (including the ability to edit and mix an unlimited number of tracks), add effects to audio files, and work with a variety of different file formats. While the full version of Audacity is available for Windows, Mac OS X, and Linux machines, the portable version is available for Mac OS X and Windows. Considering it’s open source, it makes sense that a portable version for Linux would be developed if there’s enough demand. Click here to download Portable Audacity.
8. FastStone Capture is a portable screen capture utility. You can capture anything on your screen: windows, full screen, rectangular regions, objecs, freehand regions, and even scrolling windows (a big plus over many other screen-capture programs, portable or not). Other features include the ability to add text annotations to captures, resize them, and use hotkeys for specific functions. FastStone Capture only works on Windows systems, but is compatible with Windows98 right up through Vista.  Click here to download FastStone Capture.

File Management:

1. FileZilla Portable is another PortableApps.com application for FTP. It supports FTP, FTPS, and SFTP file transfers, as well as management for transferring large files (over 4GB). There are tons of configuration options. It also supports HTTP/1.1, SOCKS5 and FTP-proxy, and includes logging to file, synchronized directory browsing, and remote file search. Click here to download FileZilla Portable.
2. WinSCP Portable is an FTP program for Windows that includes SFTP and SCP protocols and directory synchronization. It’s been around for awhile but performs all common file operations and has an integrated text editor. It also supports batch file scripting and a command-line interface in addition to a GUI.  Click here to download WinSCP Portable.
3. Toucan lets Windows users back up and sync data between two drives (like your hard drive and USB drive). It’s completely portable and free to download. There are a variety of advanced backup settings you can use, including incremental backups with compression and advanced rulesets. Click here to download Toucan.
4. 7-Zip Portable is a PortableApps.com program that lets you compress and uncompress a variety of archived file types, including 7z, ZIP, GZIP, BZIP2, TAR, and RAR files. It also supports creating encrypted 7z and ZIP archives and includes a powerful file manager. There are localizations for 63 languages available with the portable edition. Click here to download 7-Zip Portable.
5. PuTTY Portable is the popular PuTTY telnet and SSH client packaged as a portable app, so you can connect in to your systems on the go. Click here to download PuTTY Portable.

For Testing:

1. XAMPP is a complete, portable web server package of Apache, MySQL, PHP and Perl. It’s preconfigured, so all you need to do is unzip and install it. It includes phpMyAdmin, FileZilla FTP Server, SQLite, the Zend Optimizer, and MiniPerl, among other features. It’s a complete web, FTP and database server in a single package. There’s also a lite version that includes Apache, MySQL, phpMyAdmin, SQLite, and their related packages.
2. Portable Firefox is the portable edition of Mozilla Firefox. It’s a great app to take with you for working on other people’s computers, as you can store and access your own bookmarks, passwords, and preferences. The portable edition doesn’t leave anything behind on the computer you’re using, so you can be secure in saving your passwords and other information. It even appears to work with any extensions you install. It’s a PortableApps.com app, so it’s only available for Windows machines.Don’t forget if you’re using Portable Firefox to also make sure you’ve downloaded some of the useful web development add-ons available.

• Firebug – For viewing and on-page editing of HTML, CSS, and JavaScript.
• CSS Viewer – A basic CSS property viewer.
• HTML Validator – An HTML validator toolbar for Firefox.
• Web Developer – Adds a menu and toolbar with various tools for web developers.
• CodeBurner – An HTML and CSS reference guide built into Firefox

3. Instant Rails is a Ruby runtime solution with Ruby on Rails, Apache and MySQL, all ready to run. All you have to do is put it in the directory you choose and run it; there are no installation files.
4. Server2Go is a server package available with a variety of different configurations. There are packages that include Apache, PHP and SQLite; Apache, PHP, SQLite, and MySQL; Apache, PHP, SQLite, MySQL, and Perl; as well as mini packages (with only the needed files) and a “plain vanilla” package that doesn’t include PHP, Perl, or MySQL).
5. Portable Chrome is the portable vesion of Google’s Chrome browser. It includes all the features of the regular Chrome browser, including better stability and speed, tabbed browsing, and search right from the address bar.
6. Opera@USB is a portable version of the Opera web browser. It’s very similar to the desktop version, though the differences aren’t expounded upon in the documentation for the app. The full version (and presumably the portable version) includes tabbed browsing, a password manager, an inline spell checker, and support for savable browsing sessions.
7. MoWeS Portable is a portable web server for Windows. It’s been tested on Windows 98 through Vista. It’s free and released under the GNU/GPL license. The server is based on Apache, MySQL, and PHP. The biggest difference between MoWeS and many other portable server packages is that you can download MoWeS preconfigured with a variety of software options, including TYPO3, WordPress, PHPMyAdmin, OS Commerce, Drupal, Mambo, Joomla!, and others.

Other Useful Apps:

1. Sumatra PDF is a lightweight, portable, free PDF viewer for Windows. It’s designed to be portable, so there’s no “portable version” per se. It works with a variety of keyboard shortcuts, and can be configured as your primary PDF viewer.
2. Eraser Portable is a portable version of the Eraser security app. Eraser allows you to completely delete files from your harddrive by overwriting them multiple times with predefined patterns. It’s free and open source (under the GNU General Public License). This is a particularly useful app to have if you work with sensitive information on a regular basis, as it can be used to completely remove any traces of an original file.
3. KeePass is a password management program for Windows. It’s free and open source and can help you keep track of all your passwords for FPT accounts, email, website passwords, and more. It saves everything in a single database file that you can open either with a key or key file.
4. Password Corral is  password manager. With a clean, easy to use interface, strong encryption and all the features you would expect from a program you’d have to pay for, it’s no wonder thousands of people have made it their choice for password management!. Click here to download Password Corral.
5. TrueCrupt is a portable encryption program that will create a virtual encrypted disk and mount it as a real disk. You can encrypt an entire partition or USB flash drive. It uses parallization and pipelining to let data be accessed as fast as if the drive wasn’t encrypted. Be aware that TrueCrypt does require administrator privileges in order to access files, which is a major drawback if you may need to use public computers.
6. Pidgin Portable is the portable version of the Pidgin instant messaging client (formerly Gaim). It supports AOL, MSN, ICQ, Jabber, and Yahoo IM. You can add encryption plugins to it to enable secure messaging.
7. OpenOffice.org Portable is the PortableApps.com version of the open source OpenOffice.org suite of business programs. It includes all of the regular OpenOffice.org applications: Writer (a word processor), Calc (spreadsheets), Impress (presentations), Draw (graphics), and Base (database). OpenOffice.org is a great alternative to Microsoft Office and provides much of the same functionality in a free and open source package. It’s very easy to use in comparison with many other office suites, and it’s free.
8. AbiWord Portable is a word processor that can open a variety of files from other word processing programs, including Microsoft Word, Word Perfect, Open Document (OpenOffice.org), Office Open XML, RTF, HTML, and more. It includes all the basic functions you’d expect in a word processor, including spelling and grammar check and mail merge. he portable version is built on the PortableApps.com platform and works on Windows 2000, XP, or Vista. There are plugins available to extend AbiWord’s functionality.