Krusty93 is an independent software publisher distributing its work through GitHub, with a catalog focused on tools designed for Kindle e-reader owners who want to get more value from their reading habits. The publisher's two packages, Relego and SunnySunday.Cli, both fall into the personal knowledge management and reading utility category, addressing a common problem for avid readers: highlighted passages and notes tend to be forgotten once a book is finished. Relego revisits a user's Kindle highlights and delivers them back to the Kindle device, enabling spaced, passive review of previously saved passages without requiring the user to open a separate app or manually export files. SunnySunday.Cli takes a complementary approach by generating periodic recaps of notes, again delivered directly to the Kindle, and is distributed as a command-line interface, suggesting it is aimed at technically comfortable users who prefer scriptable, configurable workflows. Typical use cases for this category of software include students reviewing key concepts from textbooks, professionals revisiting insights from business or technical books, language learners reinforcing vocabulary captured while reading, and anyone practicing spaced repetition as a learning technique. Tools like these generally integrate with the Kindle ecosystem by processing highlight exports, such as the My Clippings file, and formatting the results into documents that can be sent to the device via email or USB transfer. By keeping both products open and available on GitHub, Krusty93 follows the common independent-developer model of sharing source code publicly, inviting contributions, and allowing users to inspect how their reading data is handled, which is a meaningful consideration for privacy-conscious users working with personal notes.