Chaitra Shukla Ashtamee
Keep fast on this day, worship Brahmaa etc Devtaa and Maatra Gan.
[Agni Puraan, 20]

Bhaadrapad Krishn Ashtamee - Krishn Janm Ashtamee
Falls on Bhaadrapad Krishn Ashtamee. This day is the birthday of Krishn.
[Bhavishya Puraan, 4/18]

Bhadrapad Krishn Ashtamee - Ashtamee with Rohinee Nakshatra Vrat
On this day - Bhaadrapad Krishn Ashtamee (8th Day) with Rohinee Nakshatra, Krishn was born. That is why this Vrat is kept this day. By keeping fast on this day, a person becomes free from the sins of the last 7 liven lives. Who keeps this fast, he gets son and attains Vishnu Lok.
[Agni Puraan, 20]

Maargsheersh Krishn Ashtamee - Anagh Ashtamee
On Maargsheersh Krishn Ashtamee. This Vrat is performed by young girls wishing to get married or couples who are experiencing domestic problems, with Kunkum Archanaa, they will experience the real fruits of the Vrata. This Vrat can be performed by anyone. Although it s good to perform it on Maargsheersh Krishn Ashtamee, but in fact it is very auspicious to perform on all Ashtamee Tithi. Some people believe that this Vrat can be performed on Shukla Ashtamee. People who cannot perform this Poojaa on Krishn Ashtamee, they can do on Shukla Ashtamee Tithi also. If one cannot this Vrat on Ashtamee day, it is recommended that they do it any other day in that month. One should perform this Vrat at least once a year.

Maargsheersh Krishn Ashtamee - Kaalaashtamee Vrat
On Maargsheersh Krishn Ashtamee, keep fast the whole day, take bath in the night, worship Shankar Jee and do Paaran (first food on the fasting day after finishing the fast) of the Vrat with cow's urine (or cow's milk). Sleep on the floor on that night. In Paush, worship Shambhoo and do Paaran with Ghee. In Maagh, worship Maheshwar and drink milk. In Phaalgun, worship Mahaadev and eat sesame seeds. In Chaitra, worship Sthaanu and eat barley. In Vaishaakh, worship Shiv and do Paaran with Kush water. In Jyesth, worship Pashupati, and do Paaran with waterfall water. In Aashaadh, worship Ugra, and eat Gomaya (cow dung or alternatively yogurt). In Shraavan, worship Sharv and eat Mandaar flowers. In Bhaadrapad, worship Tryambak and eat Bilva leaves. In Aashwin, worship Eesh and eat rice. In Kaarttik, worship Rudra and eat yogurt. At the end, build a Sarvato Ling and worship Shankar in it. Later feed Braahman and donate cow, clothes and gold to him.
[Agni Puraan, 20]

Budh Ashtamee
Keep fast on any Ashtamee with Wednesday, and eat only once. Who keep fast on Ashtamee, they do not suffer with poverty. Read its Budh Ashtamee Vrat Kathaa here.
[Agni Puraan, 20]     [Bhavishya Puraan, 4/17]

Budh Ashtamee Vrat
Leaving 2 fingers aside, take 8 fists rice, cook it, and keep it in a bowl of mango leaves with Kush. Worship Budh and eat food after listening to " Budh Ashtamee Vrat Kathaa". Later donate cucumber and rice with Dakshinaa.
[Agni Puraan, 20]

Krishn Ashtamee
By keeping fast for 1 year on all Krishn Ashtamee (8th Day), and worshipping Krishn on that day one can get children.
[Agni Puraan, 20]

Raadhaa Ashtamee - Bhaadrapad Shukla Ashtamee
A 9-day long festival for Raadhaa's birthday, especially for Raadhaa-Vallabh people. Starts from Bhaadapad Shukla Panchamee, though falls on Bhaadapad Shukla Ashtamee.

Somaashtamee - Year-long
Any Ashtamee which falls on Monday is called Somaashtamee. Worship Chandrachood (Shiv) along with Umaa. Take an idol whose right part is of Shiv and left part is of Umaa. Bathe it with Panchaamrit, offer Naivedya cooked in Ghee and do Aaratee with 25 lamps. Keep fast and do their Poojaa in the same way next day. Do Havan with sesame seeds and feed a Braahman or a Braahman couple. Keep this fast for one year......
[Bhavishya Puraan, 4/20]

Swargati Vrat - Year-long
If one eats food in the night on both Ashtamee and donate a cow at the end of the year; he can attain Indra's status.
[Agni Puraan, 20]

Agni Dev said - "Hey Vashishth Jee, When there is Punarvasu Nakshatra Yog on Chaitra Shukla Paksh 8th, whoever drinks 8 Ashok flower buds juice with a Mantra (Mantra is given on p 372 of Agni Puraan), they are never worried in their lives.
[Agni Puraan, 20]

Bahulaa Ashtamee
In the month of Kaarttik