Elvish is a shell with useful interactive features built in and a scripting language. It is distributed as a single statically linked binary for Linux, BSDs, macOS and Windows. Scripts use data structures and functional programming, errors are caught before execution, and command failures abort execution by default.
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A Chrome extension that restores the pre-2018 ability to look up the Facebook account linked to an email address, subject to privacy settings. It requires the user to be logged in to a Facebook account while the page is active, and returns the profile ID and profile image when a match is found.
FAIRDOMHub is a free and open platform for research data management built on the FAIRDOM-SEEK open source web platform for sharing scientific research assets, processes and outcomes. It allows organising documents and data, controlling who can see, download or edit items, describing datasets with available standards, and publishing data linked to scientific articles.
FastFlix is a free GUI for encoding videos, working with FFmpeg and a variety of software and hardware encoders. Software encoder support includes x265, x264, rav1e, AOM AV1, SVT AV1, VP9 and VVC. Hardware encoders require appropriate hardware, and most Nvidia, Intel and AMD encoders use rigaya's encoders that must be downloaded separately and linked in the settings panel. FFmpeg version 4.3 or greater is required.
File-Hunter.com is a personal page by Arnaud de Klerk covering professional and hobby information, with links to LinkedIn, Facebook, Kiva, X and an MSX legacy section. The site offers browser-playable MSX and Amiga games and demos, and hosts a set of related MSX download and archive subdomains.
FILExt is a file extension reference site offering a collection of file extensions, many linked to the programs that created the files. The site provides an online file viewer; dropping a file on the website lets FILExt analyze the file type and preview it. The database contains detailed information about almost every file extension. The site was created by Tom Simondi at the turn of the millennium.
FlowerShow is a no-code platform that converts markdown files into hosted websites. It supports use cases including digital gardens, blogs, wikis, and documentation sites. Key features include backlink mapping, interactive knowledge graphs, automatically linked searchable wikis, sidebar navigation and full-text search for documentation, password protection, and comment functionality. The service natively supports CommonMark, GFM, Obsidian wikilinks, Mermaid diagrams, and LaTeX math, and is free to use with no credit card required.
FOSS Wiki is a Wikipedia reference page for background information, comparisons, and linked sources.
Glue is a Python library for exploring relationships within and among related datasets. It provides linked statistical graphics such as scatter plots, histograms and 2D and 3D images, with selections in one graph propagating to others. It supports user-specified links across datasets and scripting through Python's scientific libraries.
Has it Leaked is a site that reports album downloads, leaks, streams and releases, with album updates, latest added and latest leaked album lists, articles, and an album calendar. It offers email alerts when an album's download leaks, plus linked projects for movies and streetwear.
Historical visualization and research record mapping a sample of linked Tor onion services.
IDB Open Data is a catalog of open datasets, indicators and data portals related to economic and social development in Latin America and the Caribbean. It includes datasets linked to publications and indicators extracted from those datasets, plus a collection of specialized data portals powered by IDB data.
Reverse email lookup tool for finding public profiles, social accounts, and identity clues linked to an email address.
Public torrent activity lookup showing observed downloads linked to IP addresses.
IndraStra Global Open Repository (IGOR) is a Zenodo-powered platform for sharing and publishing open research data, including articles, reports, and datasets produced by IndraStra Global staff, contributors, and strategic knowledge partners. It operates under an Open Access Framework, with its collection hosted at a linked Zenodo community page and an associated upload portal.
Intelligence X is a provider of free open source intelligence (OSINT) and forensic tools for investigations. Its toolset supports search across third-party sites, social media intelligence for Facebook, Twitter, LinkedIn, Telegram, and YouTube, and utilities for tasks including email validation, domain lookups, IP lookups, Bitcoin tracing, and image analysis. All listed OSINT and forensic tools are available to use at no cost.
Intelligence X is a provider of free open source intelligence (OSINT) and forensic tools for investigative use. The platform offers a suite of tools for searching third-party sites, performing social media intelligence on Facebook, Twitter, LinkedIn, Telegram and YouTube, plus utilities for validating email addresses, looking up domains, IPs, Bitcoin addresses, images and other data types.
JASPAR is an open-access database of curated, non-redundant transcription factor binding profiles from six taxonomic groups. It stores manually curated binding preferences as position frequency matrices that can be converted into models for scanning DNA sequences and predicting transcription factor binding sites. From 2026 it also stores deep learning models and discovered position frequency matrices linked to its PFM collections.
An R package that creates interactive Leaflet maps using the Leaflet JavaScript library and htmlwidgets. Maps can be used from the R console, RStudio, Shiny applications and R Markdown documents. It is linked to the open-source Leaflet JavaScript library for interactive maps.
Learn C is a free interactive tutorial site for learning the C programming language, intended for both experienced programmers and beginners. It presents chapters from Hello, World! through pointers, structures, recursion and linked lists, and requires no download. The site notes it is still under construction.
Letterfork is an AI tool that turns one Substack, Beehiiv or Ghost newsletter issue into posts for LinkedIn, X, Bluesky, Substack Notes, Threads, Instagram and Reddit in the writer's own voice. Users train a voice profile from past newsletters, then paste an issue to generate platform-native drafts.
Dataset repository covering humanities, with searchable datasets.
Lock Picking 101 is an online forum dedicated to the ethical hobby of lock picking. It provides resources for beginners through advanced practitioners, hosts public locksmith and safe query sections, and offers community discussion via a linked Discord chat.
Linked Open Data from Biblioteca Virtual Miguel de Cervantes.