Notan: Grade Calculator
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NotanIzer
bigpantsgroup
Notion - notes, docs, tasks
Notion Labs, Inc.
notin - notes in notification
Lazy Ninja
Microsoft OneNote:保存创意和整理笔记
Microsoft Corporation
Google Keep - 记事和清单
Google LLC
彩色笔记(ColorNote) 便签 彩虹便笺 记事本 笔记
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Evernote - 笔记管理专家
Evernote Corporation
概念画板 - 素描、笔记和画图
TopHatch, Inc.
Samsung Notes
Samsung Electronics Co., Ltd.