These Extensions are Not Available for Joomla 4

"Ajax Intro Articles Module" is not available for Joomla 4. This module presents an alternative layout for displaying Joomla articles in a blog layout. 

You do not need an extra extension for an article blog layout view in Joomla 4 as it is included as a menu item type in the core.

However, for simplicity we recommend these alternatives to our clients who use our Monthly Joomla Management Package:

• Raxo Module - https://www.raxo.org/
• Monthly Archive - https://demo.web357.com/joomla/monthly-archive

There does not seem to be any available version of Alf Contact for Joomla 4. The last update on there site regarding a J4 version is from December 15, 2020 - https://www.alfsoft.com/13-english/joomla/alfcontact/42-joomla-4

For basic and more complex contact display, the Joomla 4 core content extension (with custom field capabilities now) is a vast improvement over its Joomla 3 predecessor.

Another great solution for a contact(s) form is Convert Forms which has both a free and a feature richer pro version also available to our clients who use our Monthly Joomla Management Package:

• Template Creator CK - https://www.template-creator.com/

Artiseer template creator ceased to exist in 2015. Templates built in it will not work in Joomla 4. You will need to use/create a different template for Joomla 4.

https://forum.joomla.org/viewtopic.php?f=713&p=3645823

The default front-end template for Joomla 4 is Cassiopeia. It can be be customized and adapted according to your skills and there are many tutorials on line for doing so. 

However, for simplicity we recommend this alternative to our clients who use our Monthly Joomla Management Package:

• Template Creator CK - https://www.template-creator.com/

Joomla Shack's Wright Framwork and all of the templates that run on it have been discontinued for Joomla 4. You will need to use/create a different template for Joomla 4.

The default front-end template for Joomla 4 is Cassiopeia. It can be be customized and adapted according to your skills and there are many tutorials on line for doing so. 

However, for simplicity we recommend this alternative to our clients who use our Monthly Joomla Management Package:

• Template Creator CK - https://www.template-creator.com/

Rockettheme's ROK Gallery will not have a Joomla 4 version: https://rockettheme.com/forum/joomla-extension-rokgallery-solved-threads/285769-solved-gantry-5-rokgallery

A great free alternative to ROK Gallery that we like is Phoca Gallery.