My favorite addons! by Tjoval
Weak Aura - https://github.com/Bunny67/WeakAuras-WotLK | This Addon is amazing for creating custom animation, icons or text for all things in wow! I recommend Bunny67's Weak Aura, because its backported from retail wow and has more features tied to it.
idTip - https://www.curseforge.com/wow/addons/idtip | This is a neat addon if you combine it with Weak Aura!
Bagnong - https://www.curseforge.com/wow/addons/bagnon | By far my favorite addon! this lets me properly see my bags, where I have my items stored on characters and how much gold and where my gold is across all my characters!
Dominos - https://legacy-wow.com/wotlk-addons/dominos | I use this addon to change my action bar. This will increase the number of action bars you can have, and also decide to hide.
MoveAnything - https://www.curseforge.com/wow/addons/move-anything | This addon is for moving around blizzard UI, for example Target Frame, Player Frame and other related UI. It can also increase size and minimize size for blizzard UI.
SexyMap - https://www.curseforge.com/wow/addons/sexymap | It may sound a bit erotic for an addon, but this to enhance to minimap. A bonus to addon is that you can remove / hide buttons around minimap (incase you get flooted by buttons from different sort of addons).
Tidy Plates - https://legacy-wow.com/wotlk-addons/tidy-plates | This addon is great for both PvE and PvP. This addon enchase your view of targets when using nameplates (healthbar above target). You can enable to see debuff on targets, which one you have threat and much more.
AtlasLoot - [NO LINK] | This addon can be downloaded through Ascension Launcher. This addon is amazing for figuring what items you need, which items you're curious on stats or whereabout it drops or obtained.
Nice Damage - https://www.curseforge.com/wow/addons/project-7401 | This addon is for making different types of font for ingame damage and healing number (CombatFloatingText). Read the READ.ME! file to understand how to implement the new font in the folder.