In an effort to restore them as much as I could, I used a combination of waifu2x ("Single-Image Super-Resolution for Anime-Style Art using Deep Convolutional Neural Networks"), Clip Studio Paint resize/cleanup tools, and manual cleanup done by hand. Unfortunately, the red text on the title page was a lost cause. If anyone can decipher solid red rectangles please contact me lol. Source: about 1 year ago

Maybe this would help. There's also an app version of it. Source: over 1 year ago

I would recommend putting it through an upscaler beforehand, it seems a bit small. Source: over 1 year ago

Http://waifu2x.udp.jp/index.html found this image upscaler from https://www.reddit.com/r/FireEmblemHeroes/comments/a51f0k/i_turned_yusuke_kozakis_artwork_into_a_high/?st=JPIZKYIB&sh=f12f76fe a while ago, perhaps that would be the closest if IS doesn't release anything. Source: over 1 year ago

You can make it bigger for print by using by using an Japanese AI image enlarging tool. Source: over 1 year ago

Integrate everything! There’s over 2500 integrations already available in the app directory: https://slack.com/apps. Source: almost 2 years ago

The Slack Google Calendar app is the third most popular app of the 2,400+ native integrations in their directory. It allows you to take basic actions for your Google Calendar events right in Slack, and simplifies managing your daily schedule so you can reallocate the wasted time switching between apps towards more high-value work. - Source: dev.to / almost 2 years ago

You can always try developing your own plugins for slack or discord, maybe there’s already something for you: https://slack.com/apps https://betterdiscord.app/plugins. - Source: Hacker News / over 2 years ago

The Slack app directory is a mega-database of hundreds of integrations available to enhance collaboration and productivity for small teams up to entire enterprise organizations. These apps allow you to work simultaneously across tools to push and pull information, enhance each tool's functionality, increase adoption, and streamline communication asynchronously right from where you're already working and... - Source: dev.to / almost 3 years ago

Want to get something fancier than Slack’s native capabilities for your productivity needs? Head off to Slack’s official app directory, and pick something nifty to fit your needs! - Source: dev.to / about 3 years ago