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Outerbase Studio is a lightweight, browser-based GUI for managing SQL databases, designed for simplicity and versatility. (source)
OpenCharacter is an open-source Alternative to Character.AI.
OpenFreeMap lets you display custom maps on your website and apps for free. (Source)
Open Scanner scans your receipts, notes, textbooks, and anything else you point your iPhone at. (source)
Objective-See has tiny but nifty tools for macOS.
Obsidian has a well done documentation.
OpenCat is an open source quadruped robot pet framework for developing Boston Dynamics-style four-legged robots that are perfect for STEM, coding & robotics education, IoT robotics applications, AI-enhanced robotics application services, research, and DIY robotics kit development.
OpenDevin is an open-source project aiming to replicate Devin, an autonomous AI software engineer who is capable of executing complex engineering tasks and collaborating actively with users on software development projects. The other alternative is — Devika aims to be a competitive open-source alternative to Devin by Cognition AI.
OpenPanel is an open-source alternative to Mixpanel. The power of Mixpanel, the ease of Plausible and nothing from Google Analytics.
OpenStreetMap - self host the entire planet (~90GB).
OpenVoice is a voice cloning tool from MyShell.
OpenVoice: Versatile Instant Voice Cloning.
Orbit is an open source CSS radial UI composer framework.
OutRun is an open-source, privacy oriented, outdoor fitness tracker.
Observable released their open-source Observable Framework.
Open Source tools to Record and Rewind everything on your computer — Mac / PC.
OSGameClones tries to gather open-source or source-available remakes of great old games.
OpenAI’s Prompt Engineering Guide lists some good strategies for getting better results.