Pandora FMS is an open source application that can be used to monitor anything online like:

• if a website is up or down
• if the content of a website is changed (deface control or when value of a stock changes..)
• diskspace or CPU usage of a remote server (via SNMP or TCP/IP)
• & many more..

Pandora FMS can run on any operating system, with specific agents for each platform, getting the data and sending it to a server.

You can get real-time reports for every monitor & have them sent to an e-mail adrdess.

It can also send notifications of events via e-mail, SMS or Jabber (MSN, GTalk..) to the desired users.

P.S. To mention, Pandora FMS is not a simple script to install. It is made up by several shellscript files (UNIX/Linux Agents), a Web application in PHP (Console), some code in C++ (Windows Agent), some code in PERL5 (Server) and some structure and data in SQL (Database).

Classic ASP is losing its popularity, or already lost it. On the other hand, there are many developers who use it.

And, it is hard to find new & exciting projects about classic ASP but here is one: ajaxed, an ASP library with built-in Ajax support.

With the release of ajaxed 2, the library is very mature, well documented & supported with examples.

It includes a debugging tool (Logger), has an e-mail wrapper, datagrid, a validator control & much more.

ajaxed is also fully UTF-8 compatible and has support for MySQL, MSSQL, sqlite, MS Access & Oracle.

It is a great library to speed up the development process for classic ASP developers.

Multi Bit Shift is an open source Flash file uploader.

It can be easily embedded to any webpage for multiple file uploads with the upload status information.

The  text and color schemes of the uploader is customizable via standard CSS & all text can also be changed.

The uploader has 2 different versions where the paid one has an advanced interface with thumbnail, image view & more.

FlashFlickr PhotoGallery is an open source photo gallery built with Flex 2 / AS3.

The application enables users to browse your Flickr pictures, see your sets, tags and notes within your website from a good looking interface.

The gallery has a location map feature built with Yahoo AS3 libraries that shows the location of the image (if mentioned) using Yahoo maps. This requires a Yahoo API key.

It also has the Flickr authentication for Flickr registered users. This way, registered users can also add comments, tags (if allowed) to the images (Flickr API key needed).

OpenGoo is an open source web office for any company/team to create, collaborate, share and publish all its internal and external documents.

The application is in beta status & built with the mashup approach – by combining multiple solutions & offering it as a single package.

Information that can be collaborated includes:

• Text documents
• Spreadsheets (coming soon)
• Presentations
• Task Lists
• E-mails
• Calendars
• Web Links
• Contacts

OpenGoo simply works in a XAMP (Apache, PHP, MySQL) environment.

Update (12th March 2010): OpenGoo is now named as Feng Office.

ProtoForm is a "very easy to implement’, lightweight (4kb) & unobtrusive form validation & Ajaxed submit solution that depends on Prototype.

It can validate:

• e-mail
• date
• telephone number
• URL

Parameters are mentioned within the attributes like:

<input type="text" id="name_Req" name="name" title="Required! Try again" />

This makes it very easy to implement (a negative point can be requirement to define the ids in a specific way).

ProtoForm also sends data and shows response with Ajax, highlights the form field on focus and on error.

dompdf is a HTML to PDF conversion / rendering engine written in PHP 5.

It downloads and reads external stylesheets, inline style tags, and the style attributes of individual HTML elements. It also supports most presentational HTML attributes.

It enables rendering via PDFlib or R&OS CPDF class which can be selected.

Some features of dompdf:

• handles most CSS2.1 properties & selectors, including @import, @media & @page rules
• supports most presentational HTML 4.0 attributes
• supports external stylesheets, either on the local machine or through http/ftp (via fopen-wrappers)
• supports complex tables, including row & column spans, separate & collapsed border models, individual cell styling, multi-page tables (no nested tables yet however)
• image support (png, gif & jpeg)
• link and anchor support
• inline PHP support.

P.S. A security vulnerability exists with dompdf but also the solution can be foundfor it at the product page.

Swift Mailer is a feature-rich PHP mailer library for sending e-mails from PHP websites and applications.

It does not rely on PHP’s native mail() class which consumes high resources. Instead, Swift communicates directly with an SMTP server or a MTA binary to send mail quickly and efficiently.

Swift supports event-driven plugins which offer you the opportunity to really take control of the library and set this mailer apart from everything else that’s out there. 

Some features of Swift Mailer:

obedit is a Flash rich text editor that uses PHP for saving, loading and other server related features.

It has most of the text editing features like:

• bold, italic,underline
• justification, block indents,
• text color,
• font and size selection,
• links, bullets,
• background color,
• and spell checking.

openWYSIWYG is a free cross-browser WYSIWYG editor that’s shipped with most of the rich-text editing features you need.

This editor works as a textarea replacement with a single line of code. It can be used with any programming language as it is coded entirely in JavaScript.

Some features of this free HTML editor:

• Loads very fast
• HTML source code editing
• Create lists, italic, bold or similar HTML properties
• Insert images
• Enhanced table creation
• Dropdowns with formatting preview