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Ombre is an open-source AI infrastructure layer. It runs eight specialized agents on every request to handle security, caching, memory, hallucination detection, and tamper-proof audit trails. It is installed with one line of code, and user data never leaves the user's server.
OMG SPACE is a series of visuals created as a graphic design thesis project to illustrate the true scale of the solar system. All planets, including the sun and dwarf planets, are shown to scale, as are their distances from the sun, at a ratio of 1:647. Created in 2011 by Margot Trudell, the site's data is only current to early 2011, with minor design and development updates in 2015.
Omni Calculator is a platform that provides free calculators for a wide range of problems, including finance, business, and health. It hosts thousands of specialized tools, such as a p-value calculator for evaluating data compatibility with a null hypothesis.
Typed graph database where agents branch and merge like Git. S3-native, Rust, traversal + vector + BM25 in one runtime.
One Nation One Subscription is a Government of India scheme providing nationwide access to international scholarly research journals for students, faculty and researchers at centrally and state government-managed higher education institutions and central R&D institutions. It spans over 13,000 fulltext journal titles across 27 subject categories from more than 30 publishers, and includes support for publishing in selected Gold Open Access journals.
Online library catalogue for State Library of Queensland.
Website screenshot dataset and browser for exploring visual captures of many public sites.
Onion Browser is a free, open-source web browser for iOS that connects to the Tor network. It encrypts traffic through Tor, which the project describes as providing a high standard of privacy and security. Tabs close when done, and security settings can be adjusted per website. No personal data is saved or used for targeted ads.
Tor measurement project collecting performance data for public relays, bridges and onion services.
Shared catalogue of the largest libraries of Estonia.
Mermaid live editor for writing diagrams, flowcharts, sequence charts, and visual documentation.
Search an online collection of books, documents, media and archival records.
Online Notepad provides browser-based note and productivity tools, including a notepad, Cornell notes, sticky notes, a word counter, and a kanban board. The tools require no sign-up or download and save data locally.
Online digital collection at the University of Turin, Italy.
Search an online collection of books, documents, media and archival records.
Use online text and data conversion tools.
A collection of free browser-based tools for hashing, encoding, encryption, formatting, compression, file processing, QR codes, UUIDs, JSON and XML. It groups utilities for cryptography, compression, encoding and format conversion in one page.
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.
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.
Searchable database of home sales and property transactions in Onondaga County.
Browse digitized texts, images, archives and cataloged cultural materials.
onWatch is an open-source tool developed by onllm-dev that tracks AI API quotas for services including Synthetic, Z.ai, Anthropic Claude Code, Codex, GitHub Copilot and Antigravity in real time. It functions as a lightweight background daemon that uses less than 50MB of RAM, stores data in SQLite, and provides a Material Design 3 dashboard. The tool does not collect telemetry.
OSINT search engine for exposed assets, IPs, domains, certificates, and network data.