Flags that represent Taiwan, or that used to represent Taiwan..
Current and historical
Chinese Taipei Olympic flag
Flag of the Republic of Formosa (1895)
Proposed
A proposal for a flag of the Republic of Taiwan, “hearts-in-harmony” (同心旗), designed by the Reverend Donald Liu (劉瑞義) in the mid-1990s, perhaps one of the more prominent design (1994)
Flag of Taiwan made by the World Taiwanese Congress; it is also very commonly used by Taiwan independence supporters (2016)
A banner of the Republic of Taiwan by the 908 Taiwan Republic Campaign
Flag of Blue Ground, White Sun, and Moon, the Flag of the Republic of Taiwan, Temporary government in Tokyo.