In editors like gedit or notetpad++, I think we can add a plugin which enables to select some area and Find and Replace only in selected area.

Using Cocos2D.XNA and Box2D.XNA for making games for Windows Phoen 8.

My proposal is to develop a program, that inverts the noise signal and generates silence to your ears just using headsets. Many times we have people around us talking and we have to focus and need silence. You can either ran away, or put your ipod at max volume. What I propose, is just to put your headsets (with no sound), and you will hear the outside noise shifted by 180 degres, thus you hear nothing (ideally). The difficult part is that this must be real time.

Build an editor or program that can understand the SEF file format. For more details www.edidev.com/sef16.pdf

A very simple game rpg genre that would help beginners to understand the basic concept of game and how games work

A web app that integrates with Github to get your issues and then allows you to enter estimate times for each issue as well as take real times from commits.
This could then generate project reports about how well you're doing things on time.
The feature list is really endless but that's it for starters.

This PHP based OAuth library supports for both OAuth version 1 and version 2 implemetations.

The app should enable the device to be used as a game controller which can be connected to the computer via bluetooth or the cable.

There's no music player with the modern ui interface and with last.fm scrobbler.

Renew http://www.mindfulnessdc.org/mindfulclock.html
Make it open source, so we can develop it further!

The sound of the mindfulness bell gives you a signal to take your concentration to the here and now.

There are already plenty of portfolio sites aimed at graphic designers, photographers, etc.

How about one that's tailored to developers?

For example you could have a flip-book of screenshots, where the visitor can mouse-over different parts, and see pop-up descriptions of what feature the developer built.

(The images and hotspots could be defined in JSON.)

Right now I can't think of all the other features, but I'm sure there ways to make a profile that are more suited to developers.

Would be a good resource for devs to link to from their CV, LinkedIn, email footer, etc.

It would be nice to create a template for PowerPoint with the new Windows Metro Style

CodeKit is a pretty cool code editor for MacOS and includes features like live browser reloads, automatic image optimization, JSLint, etc.

It's not open-source, but we can easily download the trial version and emulate the basic features.

NFS(Network File system) is a good utility, I want to create a vitual drive by writing a wrapper over NFS drives, when you write to this DFS system, it breaks file chunks, and writes all chunks into different NFS drives, simultaneously, another thread maintains replicability over NFS drives

Many beginner digital art enthusiasts face the problem of not owning a digital tablet which are quite costly. I plan to make an application which by using either a laptop camera or user attached camera traces the drawing drawn on any white paper on laptop screen realtime making use of image processing.

Not sure if this is worthwhile but looking at the new site for Git, they have a very nice way of displaying all the manual pages for the Git commands: http://git-scm.com/docs/git-config

Something like this may be useful as a standalone app as well. Thoughts?

The NuGet team has something they use for the NuGet Docs site: https://github.com/NuGet/NuGetDocs/. Perhaps that can used a base to build a standalone app?

Hi, OpenTsdb is a very popular tool to aggregate and keep cluster information and metrics.
Facebook publishes it's own gwt-based frontend:
https://github.com/facebook/tsdash but it is very awful.
Default and other frontends (Clover, Otus) are not useful in a real applications.

So the goal is a visage-like application (https://github.com/auxesis/visage visage works with collectd files) it has clear and friendly interface.