Ikachan - Desktop Booru Viewer is described as 'Desktop booru viewer / local tagged image viewer' and is a image downloader in the photos & graphics category. There are more than 10 alternatives to Ikachan - Desktop Booru Viewer for a variety of platforms, including Android, Windows, Android Tablet, Mac and Linux apps. The best Ikachan - Desktop Booru Viewer alternative is Gallery-DL, which is both free and Open Source. Other great apps like Ikachan - Desktop Booru Viewer are Bulk Image Downloader, Hitomi Downloader, Booru Studio and Imgbrd-Grabber.
gallery-dl is a command-line program to download image galleries and collections from several image hosting sites (see https://codeberg.org/mikf/gallery-dl/src/branch/master/docs/supportedsites.md for full list).
Commercial browser extension that downloads full-size images in bulk from most web galleries, supports hosts like Flickr and Imagevenue, offers thumbnail and full image previews, skips ads and redirects, and allows users to select images before saving.
Booru Studio is a modern and easy to use image browser and download manager for public booru galleries. It can run in its own window or in a browser tab.
Very customizable imageboard/booru browser and mass downloader, with powerful filenaming features.
Boorusphere is an open source booru client written in Flutter. It supports a.o. searching, playing videos, has a theme switcher and a drawer menu, and much more.
Boorusama is a simple, modern and feature-rich unofficial client for Danbooru where you can explore, view and download the best anime images.
A booru client with support for batch downloading, written in Dart/Flutter for Android but may support more platforms in the future.
It's a good booru viewer and downloader for Android. Has lots of nice features among all "general booru viewers" on Android, this one is the one I thought to be the most similar to Ikachan.
Image browser for Tinami, Danbooru, Tumblr, Mastodon, Misskey, Pleroma, Bluesky, Dropbox, and photo album.
Powerful image downloader tool that enables you to download images from any website, URLs, and links! Just copy and paste the URL, get all images, pictures, or photos immediately.
Browse e926/e621, the furry and anthropomorphic image board on your mobile. View and download posts and pools, read comments and interact with other users.
It's features are somewhat similar to Ikachan's and it's very lightweight and very quick to load the images and videos, but it's limited to e621/e926 only.
Australia
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I like it because it's easy to use, has lots of options and it's features are very similar to Ikachan's.