Hong Jing (Jingles) is a data scientist and Alibaba PhD student who writes about machine learning and neuroscience. The site collects blog articles on topics such as reinforcement learning agents, learned optimizers, convolutional layers, transformer models and decoding brain signals.
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Open-source Java scientific computing library for JVM and Android platforms, with SciPy-like APIs for use in machine learning and data science workflows. It provides functionality for signal processing, FFT, filters, PSD, and DCT operations.
KORYO.TV is a free streaming service that retransmits North Korean state television and radio, including Korean Central Television, Korean Central Broadcasting Station radio and Voice of Korea radio, from the KRT satellite signal. It offers live streams and a programme schedule with DVR, and requires no registration. The operator states service has been restored for servers in Belarus, Kosovo and Thailand.
Laminar is an open-source observability platform purpose-built for AI agents. It provides OpenTelemetry-native tracing with a one-line SDK setup, plain-English signals that alert in Slack, and an SDK and CLI for running evals. It is written in Rust with 20x trace compression, and can be used via a managed platform or self-hosted with Docker Compose.
LAN Play Status tracks game release status, updates, availability signals, or community reports.
LangKit is an open-source toolkit for monitoring large language models (LLMs). It extracts signals from LLM prompts and responses, and offers features such as text quality assessment, relevance metrics, and sentiment analysis to support LLM observability.
Launch Chat is an Android app for starting chats with any phone number on WhatsApp, Signal and Telegram without saving the number or sharing contacts. It can open a chat from a phone number clicked in another app and extract numbers from shared text.
lighthouse-check-action checks page speed, performance, technical issues, and web quality signals.
META SEO inspector is a browser extension for checking SEO signals, page data, rankings, or website metrics.
MindBigData is an open archive of brain signals, including EEG datasets such as the "MNIST" of Brain Digits and MNIST-8B with over eight billion data points. It also lists brain signal hardware devices compatible with the data, ranging from 128-channel caps to a planned 1024-channel device.
MyPublicWiFi helps inspect Wi-Fi networks, signal details, and wireless connection information.
The New York Times offers ways to share materials with its journalists confidentially, including a submission form, Signal, postal mail and SecureDrop. The page describes what makes a good tip and notes that no communication system is completely secure.
Not Human Search scores websites from 0 to 100 on seven agentic signals, including llms.txt, OpenAPI, MCP and Schema.org. It also indexes agent-ready sites and lets users search for services, APIs and tools by machine-readable readiness. Organic rank is said to be based on readiness rather than payment.
Instagram OSINT tool for collecting profile data, followers, posts, comments, and account signals.
PhysioBank is an archive of annotated, digitized physiologic signals and time series, organized into more than 50 databases with over 36,000 recordings. The recordings are freely available from PhysioNet. A browser-based PhysioBank ATM allows viewing records and annotations or obtaining limited samples in text format. PhysioToolkit software can read data directly from the PhysioNet server without downloading files first.
PhysioNet is a research resource for complex physiologic signals that lets users find, share and reuse health data, including datasets such as MIMIC-IV, MIMIC-CXR and VitalDB. The PhysioNet Credentialed Data Use Agreement prohibits sharing access to credentialed and restricted data with third parties.
PortChecker is a free online tool for checking whether the ports of an internet-connected device are open or closed. It can also ping a remote server and test port forwarding settings. The tool attempts a TCP connection and reports success or a port open signal. Checking requires the computer to be reachable via a public IP address or have a port forwarded.
Radio propagation and station search tool for checking amateur radio spots and signal paths.
Rockpool is a Python package for developing signal processing applications with spiking neural networks. It allows users to build networks, simulate, train and test them, and deploy them in simulation or on event-driven neuromorphic compute hardware. It provides layers with simulation backends including Brian2, Torch, JAX, Numba and raw numpy.
A comparison site that evaluates secure messaging apps from a security and privacy point of view. It lists apps such as Signal, Threema, Wire, Telegram, and Facebook Messenger, and covers whether each is recommended, company jurisdiction, transparency reports and suggested improvements.
SEO Sidebar is a browser extension for checking SEO signals, page data, rankings, or website metrics.
siteone-crawler checks page speed, performance, technical issues, and web quality signals.
A free, open-source application for Windows, Linux and Mac that views and analyses the contents of music audio files. It offers configurable visualisation, analysis and annotation of recordings and is aimed at musicologists, archivists and signal-processing researchers.
Instagram statistics tool for checking public profile metrics, growth, and engagement signals.