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An online tool that checks websites and blogs for dead links without sign-up or downloads. It tests internal and external URLs, shows HTTP error codes, and displays where bad links appear in the HTML. The free version is limited to 3000 pages, with no limit on hyperlinks within those pages.
BROWSEO is a web app for viewing web pages without distracting styles and with SEO-relevant parts highlighted. It requires no download or installation; a URL is entered to start. The output focuses on pure HTML similar to what search engines see, with toggles for elements such as server response code, headings, links and META information.
The Indian Institute of Technology Madras offers the BS in Data Science & Applications, a web-enabled undergraduate program focused on data science and programming. Learners may earn a Bachelor’s degree (BS or BSc, based on completed credits) or a diploma in Programming or Data Science upon successful completion of required courses. The program has no age limit, offers scholarships, and provides academic resources in multiple Indian languages.
BTC20 Smart Chain Explorer is a BlockScout-based block explorer for the BTC20 Smart Chain that provides analytics data, an API and smart contract tools. It documents Etherscan-compatible API endpoints and an ETH RPC API supporting methods such as eth_blockNumber, eth_getBalance and eth_getLogs.
Buckwheat is a small app that helps users spend money wisely. It offers budget tracking with history that can be viewed, edited, and deleted, plus home screen widgets showing how much is left to spend. Analytics are provided at the end of each period. It is described as free forever and without ads, and is available on Google Play.
BurnRate is an AI usage analytics tool that tracks costs, tokens and usage patterns across AI coding providers. It connects OpenAI and Anthropic reporting accounts for provider-reported spend and offers a local CLI for session-level detail. Cloud workspaces come in Free, Pro at $12/month and Team at $29/seat/month plans.
BuzzSumo helps plan, write, optimize, or analyze content for SEO and search visibility.
C3.js is a D3-based reusable chart library. It wraps the code required to construct entire charts, gives classes to elements for custom styling, and provides APIs and callbacks to access chart state and update charts after rendering.
General Corpus of Contemporary Brazilian Portuguese with provenance and typology information - Corpus Geral do Português Brasileiro Contemporâneo.
Odyssey.js is an open source tool that combines maps, narratives and other multimedia into stories. It offers templates including scrolling, slide based and temporal designs, and Actions for map movements and content display. The sandbox lets users test the library and edit story content with Markdown. It is an early-stage project developed by cartodb.com with Knight Foundation funding.
Cartopy is a Python package designed for geospatial data processing in order to produce maps and other geospatial data analyses.
CatBoost is an open-source gradient boosting library on decision trees, developed by Yandex as the successor to its MatrixNet algorithm. It natively supports categorical features without preprocessing, offers a fast GPU implementation for large datasets, and reduces overfitting via a proprietary gradient boosting scheme. The library is used for tasks including search, recommendation systems, and weather prediction at Yandex.
Chain Broker is a platform for information on crypto projects funding, including investor and funding conditions for seed, private, strategic and IDO/IEO rounds. It also publishes a market overview and a dashboard ranking crypto launchpads by ROI, market cap and activity.
Charisma.ai is a conversational AI platform for building interactive scenarios for online training and campaigns. It offers realistic conversation simulations and real-time analytics on engagement, with publication to web, VR or game engine experiences through SDKs. Plans include a pay-as-you-go option and an enterprise tier with development options.
Chart.js is an open source JavaScript charting library for the modern web, described as simple yet flexible. It supports eight animated and customisable chart types and renders on HTML5 Canvas across modern browsers, redrawing charts on window resize. Version 4.0 added a colors plugin and tree-shaking to reduce bundle size.
The primary interface for interacting with OpenAI models, supporting chat, coding, data analysis, research, and agent workflows.
Checkbot SEO checker checks page speed, performance, technical issues, and web quality signals.
cheminfo.org is a website offering a collection of utilities for chemistry and related fields. Tools include NMR spectrum analysis, mass spectrometry, JSON conversion, and image processing. The site also provides exercises and simulators for spectral interpretation.
ChessMonitor provides analytics for chess players, covering played games, openings, win rates, ratings and opponents. ChessMonitor Studio combines board, notation and databases on desktop and phone, and allows searching players in Ultra, Chess.com and Lichess. Profiles are free, while Studio comes with Plus and Pro.
A personal website of Chris Albon. While browsing, the all-MiniLM-L6-v2 model runs on the visitor's computer and turns passages from congressional hearings into 384-number embeddings, which are compared to connect similar passages. Completed embeddings are saved to a shared collection, and visitors can inspect the numbers, download embeddings or pause the model.
LINDAT/CLARIAH-CZ Repository is a repository for linguistic data and NLP tools. It supports free and safe deposits with a license of choice, encouraging open licenses, and provides citation support with persistent IDs. Publicly available items include corpora and lexical resources, such as Czech, Slovak, Russian and Belarusian locative adverb data.
Clearbit is a B2B data provider that has joined HubSpot and describes itself as the first HubSpot Native Data Provider. It enriches records for leads, contacts and accounts, scores and routes leads in real time, and reveals buying intent from anonymous website traffic. Data comes from public web data, proprietary data and LLMs.
Clearscope is a platform for search and AI discoverability. It includes query tracking, query discovery and search intent analysis, plus AI drafting and content optimization tools. Paid plans include the Essentials tier at $129 per month and the Business tier at $399 per month, with a 14-day free trial.
coconutBattery 4 shows live information about battery health in Macs, iPhones and iPads. The Plus version adds further battery analytics, and a Lifetime Edition covers unlimited devices with future Plus updates. It requires macOS 12 Monterey or later.
