Flowkeeper

Manage to finish all your tasks on time

NixNote

Open source version of Evernote

CreativeNotes

Create safe and organized notes for PC and Pocket PC

Todoist

Create and complete task lists

iQ-Notes

Create notes with ease and organize all your tasks

Seacow

Integrate task and contact management

Simple Sticky Notes

Program to create notes and reminders

Google Tasks

Control Google Tasks from your desktop

CherryTree

Save your notes with this complete program

XorTime

Manage your tasks and the time you spend on them

pin 'em up

The best software to create notes and reminders on your PC

Efficient Lady's Organizer

Personal organizer focused towards women

Pagico

Very functional task planner

LeaderTask

Personal task organizer

GeeTeeDee

A different task manager

RedNotebook

A personal diary with dozens of interesting options

IBM SPSS Statistics

Poweful software to collect and analyze statistical data

Mathematica

Platform for computational development

MathType

Complete mathematical equation and formula editor

GeoEnZo

Digital board to teach and learn maths

Octave

Applied calculus software very similar to MATLAB

Maple

Solve complex mathematical operations

Statgraphics

Carry out statistical analyses on your data

Mathcad

Software for engineering calculations

Microsoft Mathematics

Solve mathematical operations with this free tool

MATLAB

Maths software tool for PC

GeoGebra

Software to learn maths at all levels

Derive

Powerful tool for symbolic mathematic calculations

WinPlot

Generate 2D and 3D graphics

PASW

One of the most powerful statistic solutions on the market

Minitab

One of the best statistical calculation programs