Avatars of Lord Vishnu

Avatars of Lord Vishnu
Matsya ~ first avatar of Lord Vishnu on earth, incarnation of giant fish to save mankind and Manu from Damanaka. 
Kurma ~incarnation of Vishnu was of giant turtle that helped Devas and Asuras to nectar the ocean for immorality.
Varaha ~ third incarnation on earth in the form of boar. He took this incarnation to rescue earth from the evil activities of Hiranakshya, a demon.
Mohini ~ feminine incarnation of Vishnu on earth. Vishnu took this avatar to rescue Lord Shiva from Bhasmasura, a demon who was blessed by Lord Shiva that on whomever he will put his hand will burn into ash.
Narasimha ~ fifth incarnation of Vishnu in the form of half man and half lion. He formed this avatar to rescue his biggest devotee, Prahlad from Hiranyakashyap.
Vamana ~ sixth avatar in a form of dwarf to rescue the world from King Bali. Bali was the most igoist but very generous. Vamana appeared as dwarf and asked him to donate area of land sizing his feet. Then Vamana grown giant and covered his whole kingdom in his feet.
Parashuram ~ seventh avatar in a form of angry sage with axe and bow and arrow. He took this incarnation to rescue people from cruelty of Kshatriyas.
Rama ~ eighth incarnation of Vishnu, a personality of humble, generous and loyal. He took this avatar to kill Ravana.
Krishna ~ last incarnation of Vishnu on earth. This incarnation was to kill Kansh and help Pandavas to defeat Kauravs in Mahabharat.
Kalki ~ it is said that Kalki will be the tenth and last incarnation of Vishnu on earth in Kalyug. This incarnation will be in a form of human in white cloths and on a white horse with sword in his hand to kill immorality. It is also said that Kalki will kill all the people on this earth and rescue only few moral humans to establish life on earth in new form.