iPhone Apps to Annotate screenshots

Collexio is a comprehensive platform designed for collecting, organizing, collaborating on, and sharing various forms of digital content. It empowers individuals and teams to curate knowledge, manage projects, and distribute information seamlessly across their network.

Monosnap is a powerful and versatile free screenshot and screen recording utility available for both macOS and Windows. It offers a comprehensive set of tools for capturing, annotating, and sharing visual content effortlessly.

Droplr is a comprehensive, cloud-based file sharing tool designed primarily for macOS, providing a seamless and efficient way to share screenshots, screencasts, files, and more.

Skitch simplifies capturing, annotating, and sharing screenshots and images. Its intuitive tools allow for quick edits and elaborations, making communication clearer and more efficient.