LoveTextures is a website presenting 150+ free textures which are created by them.
All the textures are categorized very well like fabric, grunge, wood textures & more. It is also possible to browse them by color.
Files offered are mostly around 2560×1707pixels at 300dpi which makes them suitable for print besides the web.

Web Elements Kit is a set of 17 frequently used web design objects that comes in PSD format.
It can be used for easier prototyping or updated easily to create completely unique outputs.

There are 17 elements like:
- tabbed content
- sliders
- newsletter form
- buttons
- & more
which are well organized, labeled & comes with various color variations to choose from.
Elements are offered in two ways: a single PSD file that contains all of them & PSD files for every object.
Noqta is presenting 30+ quality patterns that are free to download.
Most of them are pixel-patterns. They come with a Creative Commons license which means they can be used both in personal & commercial projects.
To download them, simply save the background-image of every pattern displayed in order to get the repeating-ready versions of the images.

Firebug is the most popular tool for analyzing HTML, CSS & JavaScript based webpages. Now, there is PHP Quick Profiler (PQP), which can be called as Firebug for PHP.
It is specially focused on analyzing the performance of PHP codes. With a beautiful interface, PQP can:
- log memory usage
- display the number & sizes of included files
- show page execution times
- log database queries

PHP Quick Profiler is not a plug & play solution as every project may have a totally different structure. But, by following the setup information & the example provided, it is easy to integrate.
To see how functional it is, you can check the demo.
Requirements: No Requirements
SEM Labs is featuring a set of free icons (200+) named Web Blog Icon Pack.
The set has a wide selection of icons from arrows to actions & e-mail icons to user icons.

Icons are 48*48px size each and comes as .PNG files.
Considering the icons in the pack, they can be easily used in a web application’s front or back-end as the pack covers all the frequently used ones.
OmniGrid is a free grid component for MooTools that has advanced features.
Having inspired from Flexigrid (for jQuery) & sortableTable, OmniGrid offers a similar functionality.

Besides client-side sorting, with a serverside script (a PHP one is mentioned), it connects to the data & can easily sort/paginate an unlimited number of records.
Columns can be resized, multiple records can be selected (data inside is shown with an accordion), the look can be customized & more.
Requirements: Mootools 1.2+
Compatibility: All Major Browsers
This is a free Ajax newsletter script that is built with PHP & jQuery.
With a very simple interface, it enables you to:
- Create categories (lists)
- Add e-mails to categories
- Send e-mails to any category and/or e-mail
- View the previously sent e-mails

It uses 1 PHP file & comes with a .SQL file for creating the necessary tables in MySQL.
To mention, the script is only the admin interface. If needed, you can create a front-end for users who want to subscribe to a newsletter by inserting their e-mails to the related categories.
Requirements: jQuery,PHP,MySQL
Compatibility: All Major Browsers
WooThemes is presenting a quality icon set that includes 79 images named WP WooThemes Ultimate Icon Set.
Icons are in both PNG / GIF formats & sized at 256×256 pixels.

The set has all the major icons that a web application may need like arrows, add-update-delete, RSS, file or search icons.
They can be used both in personal & commercial projects.
This is an unobtrusive date-picker script with a variety of customization options.
It can be accesses with keyboard, does not require embedded JavaScript blocks & pop-up windows.

This free date-picker script supports:
- multiple date formats / date dividers
- skinning via CSS
- limiting the calendar with upper and lower dates
- disabling certain days
- “smart” localisation
- higlighting certain days
- single text inputs, split text inputs or select lists
Usage is very straightforward. After inserting the datepicker.js into the webpages, defining a class to the element which the date-picker will be activated is enough.
Script can be currently reached from the source of the demo provided.
Requirements: No Requirements
Compatibility: All Major Browsers
JS Charts is a free JavaScript library for creating good looking charts.
Data to be visualized can be gathered from a JavaScript array or a XML file.

The library supports 3 types of charts:
- Bar charts
- Pie charts
- Line graphs
Charts can be created & customized with ease (the type of the chart, colors to be used, titles of every unit).
This free JavaScript charts library is well documented, provides examples and an online editor.
P.S. Although the library is free to use, it requires that you register (again free).
Requirements: No Requirements
Compatibility: All Major Browsers