Rituals for the departed in various traditions

Mourning in Judaism:

Aninut between death and burial:

https://www.chabad.org/library/article_cdo/aid/364290/jewish/The-State-of-Onain-Deep-Distress.htm https://www.chabad.org/library/article_cdo/aid/291135/jewish/Shiva-and-Other-Mourning-Observances.htm

Shiva, the 7 days (3+4) after burial:

https://www.chabad.org/library/article_cdo/aid/281584/jewish/What-Is-Shiva.htm

Sheloshim, 30 days after burial:

https://www.chabad.org/library/article_cdo/aid/291135/jewish/Shiva-and-Other-Mourning-Observances.htm

The first year after burial.

Also Kaddish is recited by men:

https://www.chabad.org/library/article_cdo/aid/291136/jewish/The-Basics.htm

text of the mourner's Kaddish:

https://www.chabad.org/library/article_cdo/aid/371110/jewish/Text-of-the-Mourners-Kaddish.htm

How jews approach death:

https://www.chabad.org/library/article_cdo/aid/282496/jewish/How-Jews-Approach-Death.htm

https://www.chabad.org/library/article_cdo/aid/266275/jewish/Death-Mourning.htm

There is a course of "Life after Death - a discovery of the soul's journey in the afterlife" on Chabad that I participated and recommend:

https://www.chabad.org/multimedia/course_cdo/aid/5268919/jewish/Life-After-Death.htm

and a book on afterlife "Seven Conversations with Jerry" by Rabbi Avraham Plotkin who is presenting the above course:

https://www.chabad.org/news/article_cdo/aid/4999660/jewish/A-Seasoned-Rabbi-Writes-an-Engrossing-New-Novel-on-the-Afterlife.htm

also by Rabbi Steve Leder "The Beauty of what remains":

https://www.goodreads.com/book/show/54705911-the-beauty-of-what-remains

and "For you when I am gone", also by by Rabbi Steve Leder, on how to write an ethical will:

https://www.goodreads.com/book/show/58985549-for-you-when-i-am-gone

The services for the departed in Christianity:

The 3 days after death, 9 days after death, 40 days after death, 3 months after death, 6 months after death, 9 months after death, 1 year after death, every year up to 7 years after passing, yearly in the Saturdays for celebrating the departed (winter, summer).

https://www.oca.org/questions/deathfunerals/prayers-for-the-departed
https://www.oca.org/questions/deathfunerals/prosphora-for-ill-and-departed

In Buddhism:

There are observed 49 days after passing in which the soul is in a Bardo state. Garchen Institute is performing Jangchock periodically. You can find more details here: https://garchen.net/annual-events/ including prayer texts and you can send the names of the departed to dedications@garchen.net by Wednesday prior to the Jangchock. There is also Jangchock for the living.

There is a book by Shunmyo Masuno that I started reading and reached the pages with the departed but haven't read them yet. The book is called "Don't worry: 48 lessons on Achieving Calm".

Here is a poem to contemplate of No-coming, No-going from Plum Village:

Contemplation on No-coming, No-going

This body is not me.
I am not limited by this body.
I am life without boundaries
I have never been born,
and I have never died.

Look at the ocean and the sky filled with stars,
manifestations from my wondrous True Mind.

Since before time, I have been free.
Birth and death are only doors through which we pass,
sacred thresholds on our journey.
Birth and death are a game of hide-and-seek.

So laugh with me,
hold my hand,
let us say good-bye,
say good-bye, to meet again soon.

We meet today.
We will meet again tomorrow.
We will meet at the source every moment.
We meet each other in all forms of life.

Here a lung on Zhitro by Lama Tsultrim Allione:

https://www.youtube.com/live/C3LU78PMvno

and here a Bardo meditation with Jai Dev Singh:

https://youtu.be/1A8cDdHuMqI

The Bardo Thodol practice from Padmasambhava translated by Lama Kazi Dawa Samdup aka "The Tibetan Book of the Dead":

https://www.chapters.indigo.ca/en-ca/books/the-tibetan-book-of-the/9781398810242-item.html

A movie by Werner Herzog on hearing in Bardo

https://vimeo.com/87617491

also there is a Bardo app available for iPhone and Android by OSHO's:

https://www.osho.com/mobile/osho-bardo

also available here:

https://oshosammasati.org/osho-meditation/products/osho-bardo/

and here a free guide for visiting the dying:

https://oshosammasati.org/a-guide-to-visiting-the-dying/

Hinduism:

Kalabhairava Karma and Kalabhairava Shanti are offtered by Isha:

https://lingabhairavi.org/offerings-and-rituals/kalabhairava-karma/

registration for Kalabhairava Karma:

https://prs.isha.in/html/forms.html/registration_kbk_yaml

Mahalaya Amavasya:

https://isha.sadhguru.org/blog/yoga-meditation/science-of-yoga/significance-of-mahalaya-amavasya/

Stages of death and importance of death rituals:

https://isha.sadhguru.org/uk/en/wisdom/article/stages-of-death-rituals