When both hands held in Alapadma hasta are crossed at the wrists and placed near the chest we get the Avahitta hand gesture.

Lets take a look at the viniyoga shloka: (uses)
Srungara Natanechiva Leelaa Kandukadharane
Kucharthe Yujyate Soyamavahitthakaraabhidhaha
This gesture is used to show :
1) Love
2) Playing with balls (can be any balls not just rubber, but also [...]

Nirutti:
Nirutti is actually said to be one of the Ashta-dikpalas. Ashta-dikpala means guardians of eight direction. Thus Nirutti is said to be guarding the south-west direction. He rides on a lion. His weapon is called the Kundayudha. His consort is Durga. Some times taking Brahma as the centre they form the Navasandhi. ‘Nava’ mean nine [...]

When both hands held in sarpashirsha hasta is crossed at the wrists, we get the Nagabandha hand gesture.

lets take a look at the viniyoga shloka: (uses)
Etasya viniyogastu nagabandhe he samataha
This gesture is used to show how the snakes twine or their nature of coiling and encircling

Varuna:
He is known as the god of oceans. He is seen riding on an ocean creature that has an head of an antelope, but a body of a fish or an alligator. His weapon is a noose. Varuna was a very important god in pre-Vedic Hindu mythology. Though only about a dozen hymns address him [...]

Yama:
Yama in the Hindu mythology is considered the God of death. Yama is described as mounted on a black buffalo. He holds a noose in one hand, in order to catch hold of his victims. In the other he holds a mace which represents his weapon. He is the son of Vivasvat (sun, surya) [...]

Indra:
Indra is said to be the king of Gods. He is more often known as the god of thunder storms, wielding a celestial weapon, The Vajra, a lighting bolt. Indra is described as reddish in complexion with two or four hands. He is the son of the Sky god and the mother earth, Prithvi. [...]

Manmatha:

In hindu mythology Mammatha is often know as Kamadeva. He is the God of love. He is the one who induces lusty desires in our minds. In some pictures he is seen as a winged man holding a bow and an arrow. His bow is made of sugarcane with a string of honey bees. And [...]

Shiva:

Shiva in sanskrit means “the auspicious”. He is responsible of the dynamism in the world. In other words he is responsible for the changes in the form of death and dissolution. In the positive sense he shreds the negative ideas and gives way to positive and the creative once. He is described in the scriptures [...]

While the hands are in chakra hasta, bend all the fingers (except the thumb and the little fingers) and hold the palms tight.

Lets take a look at the viniyoga shloka
Kurmarthe viniyujyate
The shloka says that this hasta is used to denote a Tortoise. The Kurma Avatar of Lord Vishnu is also denoted by this Hasta.

While in the Simhamukha hand gesture, the Middle finger and the ring finger is bent to form an arch. Also the thumb is slightly bent. Thus a “C” shape is formed with the Middle finger, Ring finger and the thumb. The other fingers are Erect.

This Hasta can be used to denote:

A Bracelet
Holding of [...]