Apps to Image Preview

GPicView is a streamlined and exceptionally fast image viewer designed for the X Window System, particularly popular within lightweight desktop environments like LXDE. It prioritizes speed and simplicity over a complex feature set, making it an ideal choice for quickly browsing and displaying image files.

Mnemosyne is an open-source, free flashcard software leveraging spaced repetition to optimize learning. It features a user-friendly interface and supports various content types, making it ideal for students and lifelong learners aiming to improve memorization efficiency across different subjects.

Viewnior is a lightweight and speedy image viewer designed for GNU/Linux operating systems. It prioritizes simplicity and performance, offering essential features for image browsing and viewing, including fullscreen mode, slideshows, and basic image manipulation, without being burdened by complex functionalities.

Keepass2Android is a feature-rich, open-source password manager for Android devices. It provides secure storage and management of your credentials through compatibility with the widely used KeePass database format, offering robust encryption and various synchronization options.

Geeqie is a blazingly fast and extremely customizable Gtk+ based image viewer designed for Unix-like operating systems. It excels at efficient photo browsing, organization, and basic editing, making it an ideal tool for photographers and anyone dealing with large image collections.

KeeWeb is a free and open-source password manager compatible with the KeePass format. It offers robust syncing capabilities with cloud storage like Dropbox, Google Drive, OneDrive, and WebDAV, along with an integrated password generator and support for attachments and image previews.

Nomacs is a fast and lightweight free, open-source image viewer offering a wide array of features for diverse image formats, including RAW and PSD. It provides essential editing tools, batch processing capabilities, and extensibility via plugins, making it more than just a simple viewer.

dupeGuru is a versatile cross-platform application designed to efficiently find duplicate files on your system. It uses a fast fuzzy matching algorithm to locate not only exact duplicates but also similar files, helping you free up valuable disk space and organize your data.

JPEGView is a lean, fast, and highly configurable image viewer for Windows, designed for efficient viewing and basic processing of JPEG, BMP, PNG, and other popular image formats. It excels in performance and offers real-time image processing capabilities.