auto-activating-snippets VS math-delimiters

In terms of LaTeX entry, I make heavy use of CDLaTeX (config), math-delimiters, latex-change-env (expository blog post here), as well as aas (config) (as well as many macros, of course!). I also have a few interesting-ish functions that e.g. automatically insert dollars around single characters, so that writing long documents is more ergonomic; I've written about these things a little bit here (this also showcases the preview feature of AUCTeX, which I quite like), and here.

aas with tempo (built-in). I use these to replace yasnippet and cdlatex for inserting templets and latex. Pretty neat.

I use aas (auto-activating-snippets) to do something similar. https://github.com/ymarco/auto-activating-snippets

math-delimiters. Provides a nice command to insert LaTeX math delimiters and to toggle between inline and display versions of them.

(use-package math-delimiters :vc (:url "https://github.com/oantolin/math-delimiters" :rev :newest))

I use the math-delimiters package for this. It has a command you bind to $. Pressing it once inserts \(\) and leves point in the middle. Pressing it a second time changes those to \[\]. If you had an active region at the time, it will wrap that region in the delimiters. If you press $ after the closing delimiter it will switch to the other kind of delimiter and will take care of tucking punctuation in or out. I use it both in Org and LaTeX buffers.

In terms of LaTeX entry, I make heavy use of CDLaTeX (config), math-delimiters, latex-change-env (expository blog post here), as well as aas (config) (as well as many macros, of course!). I also have a few interesting-ish functions that e.g. automatically insert dollars around single characters, so that writing long documents is more ergonomic; I've written about these things a little bit here (this also showcases the preview feature of AUCTeX, which I quite like), and here.

One more excellent tool for text input is /u/oantolin's math-delimiters package; it can be used to toggle from inline to display math (which is a feature that I've found myself using quite often while editing).

You may be interested in my math-delimiters package. It defines a command math-delimiters-insert which you should bind to $. That single command is all you need to insert math delimiters, toggle them between inline and display math, and wrap an active region in math delimiters. Thanks to a recent addition by u/slinchisl it even handles moving ending punctuation in and out of the delimiters when toggling between inline and display math.