Pingpad has been discontinued. Similar apps include Raindrop.io, which has a free version. Other options are Notesnook, Zim, CherryTree and TiddlyWiki. There's no shortage of Note-taking Tools like Pingpad, with more than 100 alternatives for Windows, Mac, the web, iPhone and Linux.
Allegory is a powerful notes app with a beautiful iOS-centric UI. The minimal and focused writing experience, combined with an impressive set of powerful features, makes this the ideal choice for everyone.
AM-Notebook is an english/german multi-featured personal information manager that provides an easy and reliable way to save notes, formula supported spreadsheets, diagrams/flowcharts, to do lists, tasks and contacts within a light weight tray icon tool.
Austria
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Business Calendar for Android is a complete calendar application that is synchronising with your Google calendars!
MobileNoter is a note-taking application for iPhone, iPad or Android platform that is able to sync with Microsoft OneNote notebooks. Do you use OneNote on daily basis on your laptop or PC and dream to have a possibility to sync it with your iPhone, iPad or Android device?
United States
Write styled Markdown notes, sync across Mac, iPhone and iPad add to-dos and tags, export to a variety of formats and choose your favourite style from a variety of colourful themes.
United Kingdom
NoteSync lets you take notes fast and sync them with your Google docs account. Automatic syncing happens every minute or when you feel like it by pressing the sync button. Offline mode fully supported. Keyboard shortcuts like CTR-L put your cursor in the search bar to easily...
Toucan tasks is a super easy to use app that integrates: calendar + todo + notes + project management. It's available for MAC computers, iPhone and iPod touch (download from App store).
Autofocus System is a simple yet effective time management system. It was developed by Mark Forster.
RightTasks places your Google Tasks in a right sidebar in Gmail, like in Google Calendar.
WinMilk is a Windows Phone client for the to-do list service 'Remember the Milk'. WinMilk lets you view your RTM tasks by date, list, smart list and tag, as well as search. WinMilk also lets you add new tasks with RTM’s Smart Add syntax and complete and postpone tasks.
Quickly and easily access your Simplenote account from your OS X dashboard. Stay organized with no effort. Let your notes automatically sync between multiple devices.
