Startrails

Obtain photos of the trail left behind by the stars

Sky Charts

Hundreds of star charts in a single program

Khi3

Complete scientific calculator with plenty of options

Celestia

Travel around the Universe from your PC

Asynx Planetarium

The Universe from your computer

Stellarium

Interesting application that lets you see the universe on your computer

Moffsoft FreeCalc

Useful calculator similar to that of Windows

SpeedCrunch

Mathematical calculations within everyone's grasp

Virtual Moon Atlas

Complete and appealing virtual atlas of the Moon

OpenUniverse

Discover the Universe using your computer screen as a telescope

PowerToy Calc

A much more complete version of the Windows Calculator

StarStaX

Create spectacular composite photos

Calculator

Carry out the fastest maths calculations

WinStars

Put a planetarium on your PC's desktop

Versaverter

Easily convert measurement units

Asteroid Data Hunter

Become the best asteroid hunter

Crescendo Music Notation Editor

Write your music scores on the computer

Guitar Pro

Compose your own guitar scores and tabs

MuseScore

Versatile music notation application that's totally free

Finale

Advanced tool to compose scores

Dany's Virtual Drum

Simple simulator to play the drums

Encore

One of the best applications for music notation

Piano Marvel

Entertaining and effective classes to learn to play the piano online

EarMaster

Train your music hearing

AP Tuner

Practical tuner that is specifically for string instruments

PDFtoMusic

Listen to your favourite sheet music from PDF files

Music Maker

An ideal program for non-professional musicians

Mario Paint Composer

Compose music with sounds from Mario Bros

Synthesia

Learn how to play the piano while having fun

Overture

Create your scores and play them with VST instruments

Sibelius

A musical notation program aimed at professionals