Daruyanagi is an independent software publisher distributing small, focused utilities for Windows through its public GitHub repository. The publisher's catalog consists of two desktop products, each addressing a distinct everyday productivity need. Petapeta is a clipboard-oriented utility that allows users to paste copied images and text directly into File Explorer as files, streamlining a common workflow for users who frequently capture screenshots, snippets of text, or other clipboard content and need to save it quickly without opening an editor or using a save dialog. XTimelineViewer is a multi-column timeline viewer for X (formerly Twitter), built with the modern WinUI 3 framework and the WebView2 control, enabling users to monitor several timeline feeds simultaneously in a native Windows application rather than through a browser tab. Together, these products reflect a development approach centered on lightweight, practical tooling: clipboard and file management assistance on one hand, and social media consumption and monitoring on the other. Both applications target the Windows desktop environment and are representative of the open-source utility category, where individual developers publish focused tools that solve narrowly defined problems. Typical use cases include accelerating content capture and organization for knowledge workers, simplifying the archiving of visual or textual information, and providing power users, researchers, or community managers with a dashboard-style view of multiple social media streams. Source code and releases are available through the publisher's GitHub page, making the software accessible for inspection, contribution, and direct download.