Embedding a content inside websites is very common with the increasing web based applications like Youtube, Flickr, Pownce etc.

oEmbed is an embedding API which aims to standardize embedding interfaces of every application.

To clear, normally if you want to use API’s of Youtube and Flickr, they will be providing you different data structures of every query you make. With oEmbed, the structures of returned results (XML and JSON) are standard.

Providers who support oEmbed in their applications are currently:

• Flickr
• Viddler
• Qik
• Pownce
• Revision3
• Hulu

If you are embedding content from these providers, taking a look at oEmbed will definitely save your development time.

Validanguage is an object-oriented, unobtrusive JavaScript form validation library that does not rely on any JavaScript frameworks (optional Prototype integration).

It provides 2 APIs:

• HTML-like API placed inside comment tags. The choice for ease of use and simplicity.
• JSON-based API for advanced configuration.

With Validanguage, you can:

• use the pre-configured functions like required, minlength, maxlength, etc.
• easily configure custom validation functions to be triggered at onblur, onsubmit, onchange events.
• add onsuccess and onerror callback functions to integrate it into your existing site design.
• & more..

P.S. Thanks to Dan for the suggestion.

It is a time consuming process to create an admin interface with standard functions such as add-edit-delete-update again and again.

ActiveScaffold, a Ruby On Rails plugin handles all the ActiveRecords smartly. It adds add-edit-delete-update functionality with an Ajaxed interface & sorting, searching and pagination support.

ActiveScaffold features:

• AJAXified table interface for creating, updating, and deleting objects
• Automatic handling of ActiveRecord associations
• Sorting, Search and Pagination
• Graceful JavaScript degradation
• RESTful API support (XML/YAML/JSON)
• Sexy CSS styling and theming support
• More extension points than you can shake a stick at
• Guaranteed to work on Firefox 1+, IE 6+ and Safari 2+
• Released under the MIT License, the same one as Rails itself, so you can use it freely in your commercial applications.