NixNote

Open source version of Evernote

Efficient Lady's Organizer

Personal organizer focused towards women

Todoist

Create and complete task lists

LeaderTask

Personal task organizer

Pagico

Very functional task planner

GeeTeeDee

A different task manager

Google Tasks

Control Google Tasks from your desktop

Flowkeeper

Manage to finish all your tasks on time

Simple Sticky Notes

Program to create notes and reminders

pin 'em up

The best software to create notes and reminders on your PC

XorTime

Manage your tasks and the time you spend on them

CherryTree

Save your notes with this complete program

iQ-Notes

Create notes with ease and organize all your tasks

RedNotebook

A personal diary with dozens of interesting options

CreativeNotes

Create safe and organized notes for PC and Pocket PC

Seacow

Integrate task and contact management

IBM SPSS Statistics

Poweful software to collect and analyze statistical data

GeoGebra

Software to learn maths at all levels

Octave

Applied calculus software very similar to MATLAB

MathType

Complete mathematical equation and formula editor

WinPlot

Generate 2D and 3D graphics

Derive

Powerful tool for symbolic mathematic calculations

Mathcad

Software for engineering calculations

Minitab

One of the best statistical calculation programs

Mathematica

Platform for computational development

PASW

One of the most powerful statistic solutions on the market

Microsoft Mathematics

Solve mathematical operations with this free tool

Maple

Solve complex mathematical operations

GeoEnZo

Digital board to teach and learn maths

MATLAB

Maths software tool for PC

Statgraphics

Carry out statistical analyses on your data