Stellarium Mobile Plus is the next generation astronomy star map app. It combines a realistic and accurate night sky simulation with a gigantic amount of online imaging and sky objects catalogs.

stellarium web is a planetarium running in your web browser. it shows a realistic star map, just like what you see with the naked eye, binoculars or a telescope.

chatgpt resources and news. learn how artificial intelligence is changing the world, and use ai chat bots to discover what you can do with them.

Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community build software that advances humanity.

the official home page of the apache openoffice open source project, home of openoffice writer, calc, impress, draw and base.

vlc: official site - free multimedia solutions for all os!

The Freedom to Create

inkscape is professional vector graphics software which runs on linux, mac os x and windows desktop computers.

oschina.net 是目前领先的中文开源技术社区。我们传播开源的理念，推广开源项目，为 it 开发者提供了一个发现、使用、并交流开源技术的平台