Picasa is described as 'Software download from Google, that helps you organize, edit, and share your photos. The local application usage and the online storage up to 1 GB is free, and it is easy to use. The online version is called Picasa Web Albums' and is a leading Photo Manager in the photos & graphics category. There are more than 50 alternatives to Picasa for a variety of platforms, including Windows, Mac, Android, Web-based and Linux apps. The best Picasa alternative is digiKam, which is both free and Open Source. Other great apps like Picasa are FastStone Image Viewer, Ente Photos, Adobe Lightroom and ImageGlass.
Manage your photo collection with Piwigo Piwigo is open source photo gallery software for the web. Designed for organisations, teams and individuals.
Simple Gallery is a highly customizable offline gallery. Organize & edit your photos, recover deleted files with the recycle bin, protect & hide files and view a huge variety of different photo & video formats including RAW, SVG and much more.
gThumb is an image viewer and browser for the GNOME Desktop. It also includes an importer tool for transferring photos from cameras.
Advanced digital asset manager offering creative asset organization, metadata editing, and integration with Adobe products. Supports multiple formats, raw editing, and file export, allowing task simplification, collaboration, and creative project management.
Fly Photos is one of the fastest photo viewers built for Windows, designed as a modern replacement for the now-discontinued Google Picasa Photo Viewer.
Focus Go is the gallery I always wanted to have, so I built it. I don't like bloated galleries with 23093485 features, so I only built the ones I need/think are needed.
Tonfotos simplifies browsing of large photo collection by grouping shots by events, dates, people, locations and so on. Quickly find what you need regardless where files are stored - on your computer, external drives or NAS.
Simple and intuitive UI, natively imports albums and faces from Picasa
A lot of functionalities. Continuous support/development from the open source community.
You can use the Photos app to view or edit photos and videos in your Pictures library and on OneDrive, and to import photos and videos. The Photos app includes a wide range of editing options to enhance your photos, from automatic fixes to advanced adjustments.
All-in-one photo editor offering organized asset management, advanced RAW processing, detailed layers and masks, HDR monitor compatibility, AI-powered tools for editing, integrated video editor for trimming, flexible culling options, and print creation features.
Diffractor unifies managing photo, video and audio files. If you centralize media on that trusty old PC; let Diffractor do the heavy lifting.
SmugMug is a subscription service for image sharing, hosting, and video uploading. It also provides a marketplace for photographers to sell digital and print media. The platform offers a suite of tools for protecting, sharing, storing, and selling photos.
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Fly Photo is not a photo management software, but it's specifically created to replicate Picasa Photo Viewer (part of Picasa & discontinued alongside it), and it has been getting pretty close to Picasa. Fly Photo's main goal is to be fast, so the developer turned off some animations by default; but once you toggle those settings back on, it's very close to Picasa.