Titles&Tools is a pack inspired by the old optifine cit packs, using the new component system added in 25w03a (1.21.4 snapshot).
The Pack Currently includes over 90+ custom items with more being added with every update.

These range from all sorts of styles and themes, with their key aspect being their simpler models, and Vanilla inspired look, while focusing on more fantastical, futuristic and even modern designs.
It currently includes custom textures for:
-86 Swords;
-12 Axes;
-18 Pickaxes;
-6 Shovels;
-6 Hoes;
-6 Bows;
As well as great variety of miscellaneous items which include as of the latest update:
-7 textures for the emerald, replacing it with a variety of gems;
-1 texture for the stick which makes it into a walking cane;
-11 textures for the copper ingot, which change it to look like different metals;
-9 totems;
-4 foods
How does it work?
Simply change the the desired item's name into a corresponding name from the pack, and it will change it's texture.

Disclaimer
In the case of any bugs be it, in the pack itself or typos in the list of items feel free to comment them if it's something I can fix it will be done in due time.
Also to take into account, this pack only works from versions 25w03a and above, 1.21.4 and bellow won't work as the system it uses isn't implemented in them.
Finally do not repost this pack or it's contents anywhere without my permission, be it another website or the minecraft marketplace. Most people won't do this but I've seen cases of packs stolen and posted under a price tag before.
Side Info and List of Content Download:
You may also find Titles&Tools on PlanetMinecraft where it was originally posted by me, but with the draw back of not having previous builds available for download.
The List of Items is a packaged ZIP file with all the textures organized by what item they're a change for in a 192x Size. You can download it through the PlanetMinecraft project page under the name "[Optional] Folder of Contents".
PlanetMinecraft Project Page