Pagico

Very functional task planner

RedNotebook

A personal diary with dozens of interesting options

CherryTree

Save your notes with this complete program

Simple Sticky Notes

Program to create notes and reminders

XorTime

Manage your tasks and the time you spend on them

iQ-Notes

Create notes with ease and organize all your tasks

Seacow

Integrate task and contact management

CreativeNotes

Create safe and organized notes for PC and Pocket PC

LeaderTask

Personal task organizer

pin 'em up

The best software to create notes and reminders on your PC

Flowkeeper

Manage to finish all your tasks on time

Efficient Lady's Organizer

Personal organizer focused towards women

Google Tasks

Control Google Tasks from your desktop

NixNote

Open source version of Evernote

GeeTeeDee

A different task manager

Todoist

Create and complete task lists

Post It Notes

Program to create virtual post-its and notes

Microsoft Sticky Notes

Sticky notes for your PC's desktop

Glass Notepad

A notepad with transparencies

MetaMoJi Note Lite

Keep all your ideas and notes

Evernote

Capture your ideas as notes

GTD-Free

Full control over all pending tasks

Trello

Organize pending tasks and ideas

TickTick

Teamwork oriented task manager

Wunderlist

Useful and simple task manager

Airtable

Application for the management of business projects

InfraDrive Digital Diary

Complete personal diary with many tools

Focus To-Do

Manage your productivity with the help of the Pomodoro technique

MeisterTask

Team-oriented task manager

Microsoft To-Do

An efficient task manager designed by Microsoft

Notion

Advanced task, list and note management for PC