productivity Apps

Calendar Import - Export (ics)

Document Viewer: PDF, DjVu,...

Tasks.org: to-do list & tasks

To-do List & Tasks & Planner

Word DOC to PDF

Vigo app - City & tourism

aCalendar - your calendar

Contacts' Birthdays

适用于Android的OTG连接器软件：USB驱动程序

OTG Checker: USB OTG Connector