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.
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Chessable is a chess training app for studying openings, tactics, strategy and endgames. It offers courses from instructors and uses science-backed learning techniques intended to boost retention. The site lists over 1000 courses and 400 authors, with registration described as free.
ChessBase India is a chess news portal covering chess news, tournament reports, videos and training. The site reports on events and publishes live coverage, a calendar and stories from the chess world, including the 51st National Under-15 championship. It also describes a redesigned website with dark mode, a language option and a search bar.
ChessGames is a chess database and community offering searches across over 2,172,000 games, discussion forums, opening and endgame sections, game collections and daily puzzles. Registration is described as quick, free and anonymous, while the Analysis Laboratory with Stockfish engine tools is limited to premium members. The site states it was founded in 2001.
Chiaki.site is a set of services built on aggregated anime data from MyAnimeList.net and Shikimori. Its sections include Watch Order, which finds related franchise titles and sorts them by air dates, and Sequel Locator, which finds related titles not yet in a user's list. It also offers image-based anime quizzes, a Discord quiz bot and a voice actor comparison tool.
Chillflix is a site that offers free online streaming of movies and TV shows in HD, with sections for trending titles, a top 10 and current and upcoming shows. The listings include animation and science-fiction titles.
Chineseposters.net presents Chinese propaganda posters with information about their history, background and design. The site offers a gallery of highlights, theme presentations, and browsing or searching by posters, artists and tags.
cholyknight is a site run by Choly that designs and sells kawaii sewing patterns. It hosts weekly free pattern releases, limited store-wide sales, and themed in-the-hoop plush files including seasonal and licensed franchise collections.
A site offering non-judgmental guidance on choosing a license for an open source project. It presents situations such as needing to work in a community, wanting something simple and permissive, or caring about sharing improvements, and points to licenses like the MIT License and GNU GPLv3. It also addresses non-software projects and not choosing a license.
Chordbook offers online web apps for learning guitar chords, scales and tuning. Users can select electric or acoustic guitar and left- or right-handed play, and the site includes beginner guitar video lessons. A MyChords feature saves selected or created chords for later playback.
Chris Shier is a Vancouver-based artist who creates canvas animations, animated gifs, and layered loops. His site provides a CV and showcases his work. All content is copyrighted and cannot be used for commercial purposes without express written permission.
CinebyTV is a free streaming service that lets users watch full HD movies, TV series, and 2026 live sports without logging in or seeing ads. The site does not store any media files on its servers, only linking to content hosted on third-party platforms including YouTube, Dailymotion, Ok.ru, and Vidsrc.
Cinegram is a streaming site for movies and TV series. It states that content can be streamed free in HD and up to 4K without signing up, while a membership offers journey tracking and a community for comments and sharing.
Video streaming site with movie and series pages, search, categories, and playback links.
Cinetimes offers a selection of movies, documentaries and cartoons, and indicates where they can be watched for free on platforms including YouTube, ARTE and Wikimedia Commons. The site lists recommended titles, this week's selection, popular television shows and movies popular on YouTube, and offers user-created movie lists.
Ciniverse is a website offering downloads of Hollywood movies, Korean dramas and TV series in HD. The site organizes titles by genre and category, including Movies, TV Series, K-drama, Chinese, Romance and Action. It lists recently added films and series and links to a Telegram channel for updates.
The San Jose CA Open Data Portal is the City of San Jose's site for open government data, offering datasets and showcases. Popular datasets include Police-Calls-for-Service, Employee Compensation Plans, Animal Shelter Intake and Outcomes, San Jose Fire Incidents and Active Building Permits, available as CSV files.
The City of Saskatoon Open Data Site is a municipal catalogue publishing City of Saskatoon data for analysis and applications. The City states it is investigating formal open data licensing and currently offers a broad license to use published Information. It does not warrant or guarantee the accuracy or completeness of the Information, and ongoing updates may not be incorporated.
City Population presents population statistics in maps and charts for countries, administrative divisions, cities, urban areas and agglomerations worldwide. Figures are mostly based on census results and official estimates, with some calculations and demarcations by the site. It also offers help pages covering data sources, abbreviations, a glossary and terms of use.
CKAN is an open-source data management system for creating and operating data hubs and portals. It enables organizations to publish, share, and use data. It powers government data sites such as data.gov, open.canada.ca, and humdata.org.
Classic Klondike Solitaire offers a collection of free solitaire games playable online in a browser, including Klondike, Spider, Freecell, Josephine and Penguin. The site states that no downloads or sign-ups are required, and games run on desktop and mobile. It lists 121 games with a daily challenge and leaderboards.
Classic Mahjong is an online site for playing free Mahjong Solitaire games without download or registration. It offers 120+ original puzzles, full screen mode, unlimited undos, hints and shuffles. The board uses 144 tiles, and puzzles are described as winnable. Flower tiles can be matched with any flower, and season tiles with any season.
ClassicGames offers online play of retro titles through multi-platform emulators including NES, SNES, GBA, N64, PSP, MAME, GameCube, SEGA and MS-DOS. Games run in the browser with no installation required, and a free download is available. The site lists games by platform and offers several interface languages.
ClassicReload is a game and software preservation site with over 6000 DOS, Windows and console games. It was set up for preservation of old retro abandonware games and abandoned OS/interfaces, playable in a web browser for education and research purposes. Games are organized by platform, genre and year.