2,445 tools
Free tier unknownCoding & development
Onepilot is a mobile SSH and agent IDE for iPhone that keeps terminal sessions alive across disconnects. It pairs to Linux, macOS, or Windows hosts, deploys OpenClaw or Hermes agents over SSH, stores LLM keys in the iOS Keychain, and alerts you when infrastructure fails.
Coding & development
OneSecure Shadow AI Guardian inventories AI applications, models and assistants on a Windows PC.
Free planCoding & development
OnlineGDB is a browser-based online compiler and debugger supporting C, C++, Java, Python, and many other languages with collaborative project saving, classroom features, and optional premium upgrades.
Free planHR & recruiting
OnlineInterview.io is a free browser-based technical interview room with collaborative code editing, embedded video chat, a drawing canvas, and multi-language REPL execution for remote hiring loops.
Free planCoding & development
OnlineOrNot provides uptime monitoring, SSL checks, multi-location HTTP verification, and status pages with alerts to Slack, PagerDuty, SMS, and webhooks. Hobby covers personal labs while Pro adds faster intervals, on-call integrations, and authenticated API access.
Free trialCoding & development
OpenCage provides forward and reverse geocoding APIs and geosearch built on open data with GDPR-conscious operations. The homepage emphasizes predictable flat pricing, worldwide coverage, and developer-friendly REST endpoints trusted by thousands of teams embedding location lookup into apps.
Free tier unknownCoding & development
Open Code Review is marketed as the open source code review agent on its official site, with a lightweight web presence pointing builders to the project repository. The homepage meta description positions it as an agentic reviewer rather than a hosted SaaS suite.
Coding & development
OpenDecider provides open decision models with typed outputs and option probabilities.
Free planSecurity & privacy
OpenHack is an AI security platform that scans codebases, verifies exploitable vulnerabilities, prioritizes findings with business context, and supports always-on AI pentesting. It combines PR security reviews, secret and supply-chain analysis, and an assistant for remediation workflows.
Free planCoding & development
OpenHands is an open, model-agnostic platform for cloud coding agents. Teams run the agent locally or in OpenHands Cloud, automate PR reviews and security passes, connect GitHub and chat tools, and govern deployments with enterprise control-plane features.
Free tier unknownCoding & development
Open Interpreter is an open-source coding agent designed to run low-cost and open-weight models locally or in your environment. The official site markets it as a terminal-friendly agent for executing code and automating developer tasks with accessible models.
Free tier unknownCoding & development
OpenJML is a toolset for specifying and verifying Java and JVM programs using JML annotations and SMT-based checking. The project homepage asks whether your program does what it is supposed to do and documents OpenJML as practical formal methods tooling for Java developers.
Free planCoding & development
Developers add a few lines of code to trace model calls and route telemetry to more than 25 supported observability backends.
Free planCoding & development
Open-Meteo provides a free, open JSON weather API with high-resolution forecasts from national weather models and no API key on the public tier. Commercial customers can subscribe to dedicated capacity on customer-api.open-meteo.com with higher limits and uptime targets.
Free planCoding & development
OpenMeter by Kong is usage-metering and billing software aimed at AI and API companies that need to turn events, logs, and metrics into billable usage. The homepage highlights real-time metering, product catalog management, entitlements, and Stripe sync for usage-based pricing without rebuilding metering infrastructure from scratch.
Free planCoding & development
Apache OpenNLP is a Java machine learning toolkit for natural language processing tasks such as tokenization, sentence segmentation, tagging, parsing, and named entity recognition. It ships models, Maven integration, and documentation for embedding NLP pipelines.
Free trialCoding & development
OpenObserve is an open-source observability platform for logs, metrics, traces, RUM, session replay, and error tracking. The vendor markets cloud and self-hosted deployments with pay-as-you-go ingestion pricing, high compression versus Elasticsearch, and optional enterprise features such as SSO and AI-assisted observability.
Free to startCoding & development
OpenRemote is a fully open source IoT device management platform for manufacturers and system integrators. It connects devices and data sources into one manager interface, supports automation rules and scripting, and provides dashboards and maps for monitoring fleets, buildings, energy systems, and other distributed assets at scale.
Free to startResearch & search
OpenSearch is a community-driven, open-source search and analytics suite for ingesting, searching, visualizing, and analyzing data. The project includes OpenSearch Core, OpenSearch Dashboards, and Data Prepper, with plugins for vector search, observability, security analytics, and machine learning under the Apache 2.0 license.
Free tier unknownCoding & development
OpenSFTP is a cross-platform SSH and SFTP client marketed as an integrated workspace with bookmarks, terminal, filesystem browser, and GPT Copilot assistance. The homepage highlights Windows, macOS, and Linux downloads from YiiDuo Technology.
Free planCoding & development
OpenSpec is a lightweight, configurable spec framework for software teams and coding agents. It helps groups capture living specifications, refine requirements, validate intent, and verify implementations stay aligned as code evolves.
Free planCoding & development
It supports npm, PyPI, crates.io, and GitHub registries through opensrc path subshells compatible with ripgrep and cat.
Free planCoding & development
OpenSumi is an open-source framework for building desktop or cloud IDE products quickly. It supports VS Code and OpenSumi extensions, customizable UI modules, and deployments in Electron or web containers, with customer examples from Alipay and Taobao mini-program studios.
Free planCoding & development
OpenWebhook provides a free webhook tester and inspector plus optional OpenWebhook Pro for permanent endpoints. The service captures HTTP requests in real time, exposes headers and payloads, supports forwarding to multiple HTTPS destinations, and offers CLI and MCP integrations for coding agents.
Showing 1,776 of 2,445 tools
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