The Useful Tropical Plants Database contains information on the edible, medicinal and other uses of several thousand plants grown in tropical regions. It is a work in progress, with records added and updated regularly. It currently lists 13362 species, and information is fully referenced.
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PlayGO is a browser-based Go game site that requires no membership registration or software installation. It includes a summary of Go rules, an introduction to the game and material on learning to play.
The Internet TESL Journal is a free online journal for teachers of English as a second language. It published articles from 1995 through 2010, and the site now serves as an online resource book with articles on teaching techniques for EFL and ESL teachers. Its archives include articles and research papers, articles on teaching techniques, and lessons and lesson plans.
The Language Exchange Network points to a Reddit community or thread with discussion, guides, troubleshooting, or shared resources.
A page mirroring documentation extracted from the Linux kernel for web access, linking to mainline and linux-next kernel documentation, README files, standards documents applicable to the kernel, videos and other kernel documentation pages. It also lists translations and documentation on memory management.
The People's Dictionary helps learn languages with dictionaries, reading tools, lessons, pronunciation, or study resources.
The Pinouts Book is a free digital book for designers and engineers, serving as a quick reference for pinout functions in electronics projects. It covers 200 commonly used components, including connectors, single board computers, dev boards, memory cards and microcontroller chips. Pages link to official datasheets and specifications, and the latest version is reformatted for A4 printers.
The Retro Web is a hardware database covering motherboards, expansion cards, chips and CPUs, chipsets, drives and related components. It offers board photos, BIOS images, manuals, drivers and software, with quick search and browsing by category. Listings include counts such as motherboards, BIOS images, manufacturers and chip families.
The Toaq Language helps learn languages with dictionaries, reading tools, lessons, pronunciation, or study resources.
The Travel Film Archive is a collection of travelogues and educational and industrial films, many in color, showing the world between 1900 and 1970. Its holdings include archives of travel filmmakers Burton Holmes, Andre de la Varre, and James A. FitzPatrick, plus footage by other itinerant cameramen. Footage is available for licensing from Getty Images and an agent network.
The Trolley Problem Game is a free game based on the trolley problem, in which a trolley heads toward five people and the player at the lever can redirect it onto a track that kills one person. The game includes dozens of interpretations of the problem and is also offered as an Android app.
TheCMB is a WebGL visualization of raw data from the Planck mission showing intensity fluctuations in the cosmic microwave background. The data is tiled over a sphere using the Healpix scheme, with up to 50 million pixels at the highest resolution, and the view can be controlled with the mouse and keyboard.
The Daily Idea collects philosophy resources from across the internet, including free online articles, videos, podcasts, books and quotes. It also offers collections of philosophy course syllabi and reading lists on many topics.
TheDevilsDictionary helps learn languages with dictionaries, reading tools, lessons, pronunciation, or study resources.
The Theoi Project is a free reference site exploring Greek mythology and the gods in classical literature and art. It profiles each deity and creature on separate pages with encyclopedia summaries, quotations from ancient Greek and Roman texts, and illustrations from ancient art. The site also offers family trees, a bestiary, and a gallery of ancient artworks.
TheSkyLive provides information about celestial objects and tools for exploring and observing the night sky. It includes star maps, a 3D Solar System viewer, visibility listings for planets, comets and asteroids, and guides to eclipses and the Moon. Users can set an observing location, and without one the site defaults to Greenwich.
TheUniGuide is a platform for finding and comparing university degree courses. It offers advice on applications, UCAS deadlines, personal statements, and student finance. Users can search courses and universities by name or location, and access guidance on clearing and other aspects of the university journey.
A word search puzzle site offering thousands of puzzles and games to play online or print out, spanning fun and educational topics. Puzzles are described as free to play on desktop, Mac, mobile and tablet, and users can create and share their own with a word search maker. Teachers reportedly make use of the puzzles.
Thomas Jefferson University is an educational institution based in Philadelphia, Pennsylvania. It offers nearly 200 undergraduate and graduate academic programs, including accelerated online undergraduate options and nearly 100 online programs through Jefferson Online. The university’s College of Nursing and affiliated faculty have received more than $6.2 million in research grants. In 2027 U.S. News & World Report Best Colleges rankings, it placed in the top 25% for Best Value Schools and Top Performers on Social Mobility. A First Destination Report for the Class of 2025 found 92% of graduates were employed or enrolled in graduate school in fields related to their studies.
Thomas Romain Perspective is an image or screenshot reference used for visual evidence, examples, or warnings.
Thought Maybe is a site presenting documentary films on topics including corporate power, media, surveillance and politics. Featured titles include The Century of the Self, The Trap and The Power of Nightmares.
The TI 84 Calculator Online is an independent third-party free online graphing calculator simulator. It mimics TI-84 Plus and TI-84 Plus CE models, providing graphing, scientific calculation and subject-specific tools for algebra, geometry, statistics, precalculus and calculus directly in a browser with no downloads or installation required.
The TIB AV-Portal is a platform for scientific videos and audios in fields including technology/engineering, architecture, chemistry, information technology, mathematics and physics. It offers services such as quoting scientific videos with persistent identifiers, curating personal film programmes, publishing videos and producing videos with support. Content includes lecture series and digitised film collections.
Timed Figure Poses is a YouTube video, playlist, or channel resource for watching related tutorials or media.