Xiaomi is a Chinese tech company most notably known for its MIUI version of Android. MIUI is based on Android v2.3.7 and CyanogenMod v7 sources. With its iOS look and feel, MIUI gives Android users yet another form of customization. 

For the first time ever, MIUI will be open source. If you check the Github you will find several applications’ source code. So far, we are looking at a handful of applications as well as the ROM source. The MIUI applications up on the MiCode Github are listed below.

• File Explorer
• Notes
• Sound Recorder
• Compass

We are expecting more source to pop-up in the near future.

Source:MIUIAndroid