Envato Marketplace has recently launched CodeCanyo. At CodeCanyon, you can purchase and sell scripts and components for a variety of languages and frameworks, currently including JavaScript, PHP, ASP.NET, and Java. Most of the items are at very low price.

Here we have collected the following 20 Really Useful Scripts & Components on CodeCanyon. You may find them useful when developing your own web applications. Please feel free to suggest some useful scripts you found somewhere else as well.

1. Living Form

This technique allows you to create unique forms that are guaranteed to impress your clients. You can choose multiple colors and adjust more than ten different variables to create your own effects. The possible combinations are infinite and there are no limits to the effects you can create.

2. ThumbsUp

ThumbsUp would be a nice addition to your website. It allows visitors to vote for anything you want. It ships with an admin interface and six different templates for you to choose from.

3. Advanced Backup System

This script is a must have for every webdeveloper/webmaster that want to save some time. Advanced Backup System or Abs helps you with tasks as backing up files, backing up databases and deploy new version to a server.

4. jSocial

With jSocial you can easily place social share buttons under your articles and pages on your website. This script uses the jQuery framework and works completely client side. So you can use it on static and dynamic webpages.

The information to submit to the social networks like the title/url/description/keywords are automatic retrieved from the html page itself so you don’t need to configure it.

5. jSahre

Just share (jshare) a javascript, jquery script that allows you to add a sticky button on your page or you can use a link. It also has a built in email function that allows the user to share your page via email without leaving your page.

6. PHP Event Calendar

PHP Event Calendar is a MySQL Database driven script that displays events on your website quickly and easily through a traditional calendar UI. It can be integrated into any existing PHP page within minutes using a simple file include.

It features a simple yet advanced Administration Panel with secure login sessions, from within this you have full control over your calendar events and gives the ability to Add Events, Search & Edit Events, Delete Events from your calendar and so forth.

7. Ajax Contact Form

This AJAX jQuery website component allows you to easily place a self-contained Contact Form on any HTML or PHP page of your existing website.

It uses just 1 file to Validate, Process and Send the completed contact form to your e-mail address and best of all, does not reload the page to validate or send the form!

8. Drop Menu

With this script you can make nice and interactive drop down menus. The advantage of this script is that it not only gives you the ability to make list drop down menu. You can also use a div as drop down element. This way you can create big drop down menus like under the buttons products and tutorials in the live preview.

9. Smart Menu

Smart Menu is simple JavaScript driven menu, which is written on top of jQuery framework. Its main features are: Two level menu system, Smooth transitions, Small footprint and XHTML compatible. It works in IE 6 , 7, 8, Firefox, Safari, Opera and Chrome.

10. Sexy Slider

SexySlider is a JQuery plugin that lets you easily create powerful javascript Sliders with very nice transition effects. Enhance your website by adding a unique and attractive slider!

11. Featured Box

With this script you can make a nice interactive slide gallery like you find on every big site these days. Because the script is highly customizable you can use this script for lots of purposes.

12. Auto Gallery from Folder Scan

The Ultimate Lazy Man’s Gallery! This script scans images from within folders and automatically builds the thumbnails and gallery pages for you. The galleries are also loaded via ajax.

13. Newsletter System

Easy to use newsletter system written in PHP . Heaps of features which allow you to quickly send professional newsletters to your member database.

14. File Manager

File Manager allows you to download, upload and modify files and folders via the browser. Written in PHP and JavaScript, File Manager introduces a unique UI for handling and manipulating files on your server without the need for FTP server/client software.

15. Digital Downloads Pro

Digital Download Pro allows you to quickly set up online store for digital downloadable goods. With integrated PayPal module and IPN technology the whole process is fully automated.

16. PayPal Memebership Subscription Manager

Fully featured User Management System with PayPal subscription integration.

17. Notification Messages

jNotice is the plugin for you, if you like to use some nifty popup’s on your websites or applications. This plugin is very customizable because you can select a div that you want to use as popup. In this div you can place whatever content you want.

18. PHP Login & User Management System

PHP Login & User Management is the MySQL powered website PHP login script, another high quality script designed and created by Jigowatt exclusively for ThemeForest. It features changable User Levels via the Control Panel incase your website requires different levels of page security amongst loads of other useful features!

19. Sharp User Management System

Sharp User Management (Sharp UMS ) is a MySql and PHP application that is designed to be easily integrated into an existing PHP solution or be used as the base for your next php project. It will allow your website users to immediately sign up with your system straight out of the box.

20. Mobile Site

This application helps you to create in no time a mobile version of a website. This script supports all major devices like iPhone, Blackberry, Android devices, PSP , Windows mobile, Opera mini devices and other generic devices.

With this script there is no need for you to create a subdomain for your mobile website. This script detects if the visitor is using a mobile device and then shows the right versions.