GitHub, by far the most used online repository for coding projects, hosts codes of many of us.

Huboard is an open source web app (built with Ruby on Rails) that adds project management capabilities to GitHub repositories.

It uses the GitHub public API, makes use of GitHub issues (so, no need to sync anything) and provides a customizable task board.

Milestones can be created, issues can be assigned to them (and to users) with drag ‘n’ drops and milestones can be prioritized by re-ordering them.

The app can be deployed with locally using Pow or to Heroku very easily.

When launching a new web project, having a “coming soon” page that collects e-mails of users to notify them about the launch is pretty common.

The same also goes for some other landing pages that ask users to fill a form to move forward.

Desant is an open source, single page web application (in Backbone.js managed by Sinatra backend) for handling such cases with ease.

Any page built with it can easily collect user information via forms, it keeps track of the referring URLs and the locations of visitors (by country).

It uses MySQL for storing data and can be installed manually or quickly with Vagrant.

Mercury is a HTML5-powered WYSIWYG editor similar to the popular ones like TinyMCE or CKEditor but with a different usage experience.

Rather than being positioned inside a given element, it appears over the complete web page and can be used to edit the whole page or any number specified areas.

It supports previewing the edited content and inserting links, images, videos or tables. File uploads can be accomplished with drag 'n' drops.

Snippets can be defined and inserted quickly with the help of a sidebar. And, a similar sidebar exists for taking notes.

Also, collaborative editing is supported. Just edit any page that others are working on at the same time and see their changes in real time.

Mercury can be either installed as a Rails gem or by including the necessary JS and CSS files into our web pages.

Ruby on Rails is an impressive development platform which is used widely by developers and popular apps.

If you're already experienced with it, preparing the development environment it requires is pretty easy. However, if you're new to Rails, it can be tricky.

Rails Installer is a free installation package which includes everything needed for a full Rails stack (Ruby, Tails, Git, Sqlite, Devkit).

Currently, it is compatible with Windows but Mac and Linux versions are mentioned to be "coming soon"

Creating a project with Rails is usually pretty quick with the features it offers, however, the first repetitive steps can be time-consuming.

RailsWizard is a free and open source web application that helps you rapidly customize and build Rails application templates.

It asks you to choose your database and ORM, unit and integration testing framework, JavaScript framework, authentication system and more.

Once the options are selected, it generates a unique command URL that needs to be run with the Rails application generator.

Detect Mobile Browser is an open source project for easily understanding whether a visitor of a website is using a mobile browser or not.

It provides codes in several scripting languages (PHP,Rails, ASP, JSP, Coldfusion, .htaccess & JavaScript) that can detect the browser.

The website also has a simple forwarding function which you can create a link like:

http://detectmobilebrowser.com/a.com|b.com

and the user will be redirected to "a.com" or "b.com" depending on the browser type used.

Behind almost every successful web application, there is an easy-to-use & feature-rich API as they simply help the main application to spread into others & reached by more users.

Also, an API-enabled application can be easily developed further using the API itself.

In order to create an API for your web application, here are 10 tutorials to get you started. But before that, you may want to checkout the video: How To Design A Good API and Why it Matters by Google.

PHP

Create a REST API with PHP

A very detailed yet easy-to-implement tutorial on creating a REST API with PHP.

And, there is a follow-up article: "Making RESTful Requests in PHP" by the same author which can guide you as well.

How to Add an API to your Web Service (PHP)

A detailed tutorial which describes the concepts like REST, SOAP & creates an API step-by-step with PHP.

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Ruby on Rails is a powerful web framework that helps creating web applications easier, faster & writing an organized code.

There are lots of websites that use it including popular ones like Twitter, Basecamp, AboutUs & many more.

Also, Ruby on Rails powers some amazing open source web applications which you may want to use directly or improve further.

Here is a well-categorized 23 open source Ruby on Rails applications:

(Note: There are few Merb apps. in the list too which we believe is ok considering Rails & Merb are getting into the same package with Rails 3.)

Project, Task & Time Management

Notes

Notes is an easy to use to-do-list & notes manager application.

It is possible to create pages & make them public (if wanted) or create simple notes. With the Jabber listener support, you can eevn add new notes from your Google Talk by chatting with a bot.

Reminders can be set for each note that can be sent to you by e-mail or SMS (via a Twitter bridge).

Tracks

A to-do-list manager with a clean interface. Tracks lets you to categorize, prioritize, schedule & star items for a better usability (see WRD post).

Interface is Ajaxed & many tasks are done by drag'n drops. The application has multi-user support & comes with a built-in web-server for user who want to install it to their computers.

ClockingIT

It allows keeping track of all your tasks and the time you spend on them. With just a click, the timer can be started (see WRD post).

But not only that. There is a built-in project management system with milestones, reports & tasks.

ClockingIT tracks/logs every change to the documents & can send notifications via e-mail, RSS or iCal.

It is normally a free hosted application & source can be found here.

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Tracks is a web based, advanced & open source to-do-list (getting things done) application built with Ruby on Rails.

It comes with a built-in web server (WEbrick) which makes it easier to run on your own computer or it can be installed to any Ruby on Rails enabled web server.

Application has a very slick interface & offers a high usability with drag’n drops & Ajaxed actions.

Tracks is a multi-user to-do-list application where everyone can have their own tasks.

Items can be categorized, proritized, scheduled & starred (for reaching them easier).

With a chart-supported statistics page, you can see the progress of your tasks, analyze them better like finding out which are your productive days, which task took more then expected & more.

The application has a powerful feed support (text, iCal and RSS). You can subscribe to a list & get status updates for them.

Tracks also makes it possible to getting integrated with other apps. with its API. And, it provides a lightweight interface for mobile phones at  http://tarcksurl/mobile/.

Panda is an open source solution that handles uploading, encoding & streaming videos.

All the process is completed via an elegant REST API.

Panda is designed to run in the cloud using Amazon's array of web services.

The application runs on a customised EC2 instance with everything pre-installed, including FFmpeg and an plethora of codecs.

SimpleDB is used to store all of data for video, encoding, accounts and encoding profiles. Uploaded and encoded video files are then stored on S3.

Other features of Panda:

• Everything contained within one elegant Merb application.
• Support for FLV, h264 for Flash, iPhone formats & more.
• Panda gem for painless integration with Ruby on Rails and Merb.
• Lovely little admin dashboard for managing your videos.

By default, Panda uses the JW FLV player but you can switch to any other video player easily.