IP2Location provides a free IP lookup demo that reports geolocation and proxy data for an IP address. Results include country, region, city, coordinates, ISP, usage type, ASN, and proxy status. The demo uses the IP2Location DB26 geolocation database and IP2Proxy PX12 proxy database, and also shows an IP geolocation API response.
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IPTVnator is a cross-platform open-source IPTV player supporting M3U/M3U8 playlists, Xtream Codes API and Stalker portals. It is available as a desktop app and as a self-hosted PWA in the browser. Features include an XMLTV program guide, live TV, movies and series, offline downloads, recordings and a phone remote. It is free and open source for Windows, macOS and Linux.
isMalicious checks IPs, domains, URLs, emails, phones and crypto wallets against indexed threat indicators. It returns verdicts with contributing sources, categories and a risk score from 0 to 100 in a JSON response. Data is available through a REST API, STIX/TAXII feeds and an MCP integration for AI assistants. A free plan allows 50 lookups per month.
A reference page for ClojureScript's JavaScript API covering the stable, publicly consumable indexOf and lastIndexOf functions. These get the index of a value in a sequential collection, or -1 if not found, with an optional starting index for the search.
jcode is an open-source terminal coding agent written in Rust. It supports agent swarms, background tasks, and a small RAM footprint, and is installed with one command on macOS, Linux, or Windows. Login flows connect subscription and API model providers, and the agent itself is free while hosted inference plans are available.
The JRC Data Catalogue is the data catalogue of the European Commission Joint Research Centre. It provides access to 4315 datasets and 257 collections covering topics including environment, energy, climate change, and agriculture. The platform offers SPARQL search, a catalogue API, and links to related EU data resources.
Judge0 IDE is a free and open-source online code editor and compiler. The page links to a GitHub repository, embed guide, HTTP API documentation, privacy policy and terms of service. It also lists a set of selectable inline suggestion models.
Juicebox is a temporary file hosting site that accepts uploads and supports pasting text or URLs for text snippets or media. Per its documentation, it runs as two separate services, juiceback (API gateway) and juicehost (file storage), both of which are needed to handle uploads and file serving. QUIC/HTTP/3 is optional and requires compiling with the quic feature.
Kenya Open Data is an ArcGIS Hub-powered platform that enables users to discover, analyze, and download datasets in formats including CSV, KML, Zip, GeoJSON, GeoTIFF and PNG. It provides API links for GeoServices, WMS and WFS, supports analysis via charts and thematic maps, and allows creation of StoryMaps and Web Maps.
Keras is a deep learning API that focuses on debugging speed, code conciseness and maintainability. It uses a multi-backend approach that allows work with JAX, TensorFlow and PyTorch, and the KerasHub library provides Keras 3 implementations of popular model architectures with pretrained checkpoints.
Respan is an AI gateway that routes requests to over 1,000 models through one API endpoint, with automatic fallbacks, response caching, and spending limits. It also provides built-in observability for tracing LLM calls, tool calls, and agent steps, plus automated evaluations and security testing for masking PII and red-teaming agents before launch.
Killed by Google is an open source list of dead Google products, services and devices, presented as a graveyard or memorial. The page lists entries such as ChromeOS, Google Earth Pro, Firebase Studio, Tenor API and Pixel Studio, with categories for apps, services and hardware.
A graveyard tracking the lifecycle of every OpenAI product, feature and API, marking them alive, killed or zombie. It includes shutdown dates and countdowns for ChatGPT features, the Sora apps, ChatGPT Plugins and the Atlas Browser.
Kilo is an open source AI coding agent for VS Code, JetBrains, CLI, desktop and cloud. It offers access to 500+ models at zero markup, bring-your-own keys, or local models for privacy. Kilo Gateway provides a unified API to access AI models through a single endpoint.
Kinopio is a spatial note-taking canvas for collecting and connecting thoughts, ideas, and plans, alone or collaboratively. Cards can be connected, grouped into boxes and lists, and edited in bulk by painting over items. It also offers an API for reading and editing cards and spaces, and help documentation. The site states it is free for 100 cards with no sign up required.
Kiri:Moto is a browser-based 3D slicer and toolpath generator that creates output for 3D printers, CNC mills and laser cutters. The page lists help documentation, APIs, forums, a Discord server and bug reports, and describes it as a project for makers, hobbyists, professionals, students and educators under active development.
Kismet is a sniffer, WIDS, and wardriving tool for Wi-Fi, Bluetooth, Zigbee, RF, and more, running on Linux and macOS. It provides distributed capture over TCP sockets or websockets, a unified kismetdb logfile based on sqlite3, and a REST-like API for its embedded webserver.
KnockKnock is a macOS application that lists persistently installed software to reveal malware that installs itself persistently. It enumerates known locations where persistent software may be installed. Signed Apple binaries are filtered out by default, and legitimate third-party software is also displayed. It requires macOS 10.15 or later and can optionally use a VirusTotal API key.
An unofficial launcher and documentation site for Knockout City, a multiplayer fighting game. Public servers hosted by the community can be accessed through the launcher. The site also documents an API with auth, stats and web sections, and describes Docker as a way to host a private server.
Koel is an open-source music streaming server that lets users host and stream their own music. It includes media management for uploads and metadata, Subsonic and OpenSubsonic API support, and iOS and Android apps. The Community version remains free and open-source; a paid Koel Plus version adds features such as individual libraries and storage drivers.
Koinpark is a crypto exchange in India for buying, selling and trading 250+ cryptocurrencies. Users can start with ₹100 and deposit INR via UPI, IMPS, NEFT and RTGS. The platform offers a mobile app for Android and iOS, address whitelisting, an anti-phishing code, and public REST API documentation.
KushoAI is AI-native infrastructure for software maintenance, with autonomous agents integrated into customer CI/CD pipelines to handle continuous testing, healing, and monitoring. It automatically generates test suites from OpenAPI specifications or Postman collections to catch breaking API changes before production.
Kutt is a free, open source modern URL shortener. It supports custom domains, link management, usage statistics, an API for programmatic access, and offers browser extensions for Chrome and Firefox, with options to self-host the service.
Label Studio is an open source data labeling and annotation platform for multi-modal data, including text, images, audio and time series. It lists uses such as LLM and agent evaluation, computer vision, NLP and document tasks, and audio transcription. It offers API, Python SDK and webhooks, and is available via pip, Homebrew, Git and Docker.