概念 - 素描、筆記和畫圖
TopHatch, Inc.
Journey: Diary, Journal
Two App Studio Pte. Ltd.
Microsoft OneNote:儲存構想和整理筆記
Microsoft Corporation
Notein:手寫筆記,筆記,PDF註釋
ORION STUDIO PTE. LTD
Evernote - 記事整理工具
Evernote Corporation
FolderNote - 筆記 記事本 便條
Notas Notepad
J notes-手寫筆記note&PDF閱讀註釋
one of the handwritten notes