
Description: LightBulb is an open-source note taking and knowledge management software. It allows users to easily capture ideas, organize notes, manage tasks, set reminders, and more. Key features include hierarchical note organization, tagging, cross-linking between notes, attachment support, search and navigation, privacy controls, and customizability.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Twilight is a free open source software that adjusts your screen to reduce eye strain. It makes the color of your screen adapt to the time of day, reducing the amount of blue light emitted. This helps prevent disruption of your circadian rhythms and improves sleep.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API