oist.repo.nii.ac.jp
Find digitized publications and collection items through an online library.
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opac.lib.oita-u.ac.jp
Find digitized publications and collection items through an online library.
dpla-okhub.library.okstate.edu
OKHUB is Oklahoma's participation in the Digital Public Library of America. Partners collaborate with DPLA to increase online access to collections held by cultural organizations across Oklahoma, offering users Oklahoma collections alongside millions of items such as photographs, maps, manuscripts, and audio-visual materials from libraries, archives, and museums across the United States.
oldbaileyonline.org
Find and access criminology research data, with indexed still image.
oldschool.runescape.com
Old School RuneScape is a retro styled MMO described as online gaming heritage. It features a levelling system and risk-it-all PvP, and the community controls development. The site offers free play and membership sign-up.
otcs.minuspoint.com
Old Timey Computer Show preserves and presents historical films, classic productions, and moving-image collections online.
oldweb.today
Emulator-style archive browser for viewing old websites through historical browsers.
oli.cmu.edu
OLI (Open Learning Initiative) offers free and low-cost self-paced online courses designed exclusively for independent learners. The courses are not intended for classroom use or formal assignments, and cover subject areas including language and speech, computer science, life sciences, and social sciences. Independent learner courses do not provide instructor support, tests, certificates, or academic credit.
github.com
This Python application is an OSINT (Open Source Intelligence) tool called "Ominis OSINT - Web Hunter." It performs online information gathering by querying Google for search results related to a user-inputted query. The tool extracts relevant information such as titles, URLs, and potential mentions of the query in the results.
omniglot.com
Omniglot is an online encyclopedia focused on writing systems and languages. It catalogues alphabets, abjads, abugidas, syllabaries, constructed scripts, and natural language profiles. The site also offers language learning tips, multilingual useful phrases, numbers, idioms, songs, stories, and other language-related resources for users interested in linguistics or language study.
onesearch.slq.qld.gov.au
Online library catalogue for State Library of Queensland.
onecompiler.com
OneCompiler is an online code editor and compiler for writing, running and sharing code in the browser. It supports coding agents, embeddable editor and challenge widgets, and APIs for code execution in 110+ languages.
oneconverter.com
OneConverter is a free online service for converting PDF files and units of measure, intended for work, study and business. It offers file conversion, unit converters and PDF tools such as merging, splitting and compressing, and works on Windows, Mac and Linux with an internet connection.
onionplay.st
Online movie and television catalogue from OnionPlay, organised for browsing and playback.
ester.ee
Shared catalogue of the largest libraries of Estonia.
online2pdf.com
Online2PDF is a free online PDF converter that combines conversion, merging, editing, compression, unlocking and protection in one interface. It converts Word, Excel, PowerPoint, OpenOffice, image and XPS files to PDF and exports PDFs to Word, Excel, PowerPoint and JPG. It also supports page extraction, reordering, splitting, rotation and removing printing or editing restrictions.
onlineexifviewer.com
Online EXIF Viewer is a browser-based tool for viewing EXIF data and image metadata. It shows camera and lens details, shutter speed, aperture, ISO, capture time and GPS location when present. It also reads IPTC and XMP metadata, including captions, keywords and creator credits. Metadata can be copied, downloaded or shared through a public link.
t.me
Telegram link is a Telegram channel, group, or bot link for updates, files, community posts, or support.
onlineinterview.io
OnlineInterview.io is a free remote code interview platform with an embedded video chat, a drawing board and an online code editor that runs code in the browser. Rooms are created with one click and support up to three users, such as one candidate and two interviewers.
onlinelogomaker.com
Online Logo Maker is a logo creation tool offering a free and a premium edition. The free pack allows downloading a logo at 300 px, while the premium pack allows 2000 px. It provides templates, a font selection and an account option for saving projects to edit later.
onlinenotepad.org
Online Notepad is a free browser-based plain text editor for creating and editing multiple plain-text files without registration or login. It autosaves drafts every second using browser local storage, restoring documents after a tab is closed or the browser crashes, and supports saving files to a computer. Features include undo, find and replace, spellcheck, word count and print.
onlineocr.org
OnlineOCR is an online optical character recognition service that converts images and PDF files to text. It supports formats such as JPG, PNG, GIF, JFIF, HEIC and PDF, and offers simple OCR as free raw text recognition alongside a premium OCR mode for tables, lists and headings. The site lists more than 100 languages for recognition.
onlinetexttools.com
OnlineTextTools is a free, browser-based suite of text processing utilities. It offers hundreds of tools for generating, converting, replacing, filtering, encoding, and decoding text, with on-the-spot result previews. The service is part of the Online Tools family created by Browserling, and processes all user data locally in the browser for security.
onlyoffice.com
ONLYOFFICE is an open-source office suite providing document editing for text, spreadsheets, presentations, PDFs and fillable forms. It offers desktop and mobile apps, online editors, AI assistants for content generation and analysis, and connectors for integrating the editors into other platforms. It can run on a user's server or in the cloud.