Note: This is only a first draft/brainstorm. I will try to organize the list with more useful sections in the future
Feel free to contribute!
annie: YouTube-DL alternative written in Golang
aria2: A lightweight multi-protocol & multi-source command-line download utility
CrowLeer: Powerful C++ web crawler based on libcurl
curl: Tool and library for transferring data with URL syntax, supporting many protocols
Horahora: Video hosting website and video archival manager for Niconico, Bilibili, and YouTube
httpie: A tool similar to curl and wget but designed to be user friendly, useful for web scraping with shell scripts but be aware you're adding a dependency by doing so.
news-crawl: Cralwer for news feeds based on StromCrawler that prouduces WARC files
Plowshare: Command-line tool to manage file-sharing site
Rclone: A command line program to sync files and directories to and from various cloud storage providers
rsync: An open source utility that provides fast incremental file transfer
Suck-It: Recursively visit and download a website's content to your disk (multi-threaded)
wget: Utility for non-interactive download of files from the Web
wget2: Successor of GNU Wget, works multi-threaded
wpull: Wget-compatible web downloader and crawler
you-get: Dumb downloader that scrapes the web
ytdl-sub: Automate downloading and metadata generation with YouTubeDL
yt-dlp: A fork of YT-DLP that behaves better
BBCSoundDownloader: Bulk downloader for BBC's Sound Effects library http://bbcsfx.acropolis.org.uk/
ChanThreadWatch: Saves threads from *chan-style boards and checks for updates until the thread dies
comics-downloader: Command-line tool to download comicsand manga in pdf/epub/cbz/cbr from supported sites
floatplane_ripper: Script to rip all videos from https://floatplane.rip/
gallery-dl: Download image galleries and collections from pixiv, exhentai, danbooru and more
Discord-Channel-Scraper: Discord server archival (json output, download attachments and emojies)
dzi-dl: Deep Zoom Image Downloader
FanFicFare: Tool for making eBooks from stories on fanfiction and other web sites
FicSave: Online fanfiction downloader Source code is available, website however is now offline.
flickr_download: Simple script to download a Flickr set
Google Images Download: Python script for downloading images
iiif-dl: Command-line tile downloader/assembler for IIIF endpoints/manifests
imgbrd-grabber: Very customizable imageboard/booru downloader with powerful filenaming features
instaloader: Download pictures (or videos) along with their captions and other metadata from Instagram
InstaLooter: API-less Instagram pictures and videos downloader.
Instagram Scraper: Instagram-scraper is a command-line application written in Python that scrapes and downloads an instagram user's photos and videos. Use responsibly.
PyInstaLive: Instagram live stream downloader
RedditDownloader: Scrapes Reddit to download media of your choice
Scribd-Downloader: Allows downloading of Scribd documents
snscrape: A social networking service scraper in Python
RipMe: RipMe is an album ripper for various websites. Runs on your computer. Requires Java 8.
Tube Archivist: Self-Hosted Docker container for automated/scheduled YouTube downloads of channels, playlists, etc.
tumblr-utils: Utilities for dealing with Tumblr blogs, Tumblr backup
yt-mango: YouTube metadata archiver the Web (HTTP & FTP)
Youtube-MA: YouTube metadata archiver