oCD Resource Pack started out as a personal texture pack by disco_. After his countless YouTube uploads and requests for his resource pack he made it available to everyone a couple of years ago. This pack is highly simplified and slightly over stylized, in a good way! Inspired by the the default pack it has no noise, harsh colors, complete angles and even spacing! Great for OCD!
Since this pack is 16x resolution you don’t need to mess with additional mods like optifine or mcpatcher.