Retool is a platform for building internal web and mobile apps, workflows and AI agents on top of your databases and APIs. It includes an AI app builder, Retool Database, workflows with schedules and webhooks, and cloud or self-hosted deployment.
Reviewable is a code review tool for GitHub pull requests. It tracks which files and revisions each reviewer has seen, keeps line discussions open until resolved, and lets teams define custom completion conditions. It is free for public and personal repos; organizations pay per contributor.
Reworkd provides a no-code web data extraction platform with managed browsers, captcha solving, scheduling, and API access for large-scale scraping workflows. The company announced a product sunset in February 2025 but still publishes Hobby and Pro tiers on its pricing page.
rgx.tools is a free AI regex generator that converts plain-language descriptions into regular expressions using OpenAI GPT-3.5 Turbo. The interface includes sample prompts and code examples to help developers test patterns quickly.
Rhesis AI is an open-source collaboration layer for teams building AI agents, giving domain experts and engineers a shared workspace for tests, reviews, traces, and evaluations. Teams can self-host without metering or start on Rhesis Cloud with a free allowance before upgrading for volume and access controls.
Richoo markets an Agent Execution OS that governs multi-agent software delivery with traceable requirements, verified evidence, and production-ready outputs. The console shows long-running tasks decomposed into feature units, code changes, tests, and verification steps rather than one-shot codegen.
Rider is JetBrains’ cross-platform IDE for .NET, ASP.NET, MAUI, game engines such as Unity and Godot, and cloud workloads on Windows, macOS, and Linux. It combines refactoring, debugging, and AI assistance for full-stack .NET and game development.
riivo is a consulting and engineering studio that designs and builds intelligent systems with low-code platforms, cloud stacks, and AI agents. The public site emphasizes partner certifications with Anthropic, Microsoft, Bubble, and others, plus an on-site agent to scope projects.
Riku.ai markets a no-code platform to build, experiment with, and deploy AI-powered applications quickly. The marketing site routes users into a Bubble-hosted app for creation workflows while emphasizing accessibility for non-developers.
Maxxwell by Rindler is a desktop workspace for orchestrating many coding agents at once across repositories. It tracks running agents, surfaces items that need human attention, and coordinates branches and tasks so developers spend less time babysitting autonomous coding sessions.
Rivestack provides managed PostgreSQL with pgvector on dedicated NVMe for AI workloads, combining relational rows and vector indexes in one database. The vendor publishes measured latency benchmarks and fixed monthly plans with a free sandbox tier.
Rivet is a design agent for coding agents that explores dozens of design directions in parallel so builders can pick a visual direction that fits. The marketing site describes it as pairing with existing agent workflows rather than replacing code generation.
Roark is a voice-AI QA and evaluation platform for teams running production voice agents. It simulates hundreds of caller scenarios before launch, scores live calls on audio-native metrics, supports human review, and documents fixes so teams can ship voice agents with evidence.
RoboCoder is a VS Code extension that integrates GPT-4 Turbo with the editor so the model can open and edit project files from natural-language instructions. It targets developers who want an AI collaborator inside their existing IDE workflow.
Roboflow is a computer-vision platform for labeling data, training models, deploying inference, and monitoring visual AI in production. It bundles datasets, workflows, Roboflow Agent, and serverless or self-hosted inference for vision teams.
Robot Framework is an open source automation framework for test automation and robotic process automation (RPA). It uses human-readable keyword syntax, supports Python and Java libraries, integrates with external tools, and is backed by the Robot Framework Foundation and community events.
Robots.txt Generator at generaterobotstxt.com is a free, open-source tool to build, validate, and analyze robots.txt files. It offers preset allow/disallow templates, CMS-specific starters, optional AI-bot blocks, sitemap lines, and download of the finished file.
Robusta is an AI SRE platform that groups duplicate alerts into incidents, investigates them with infrastructure context, and routes results to Slack, PagerDuty, Jira, and other destinations. It connects to Prometheus, Datadog, Grafana, Sentry, and webhook or MCP sources to reduce on-call noise.
RobWork is a collection of C++ libraries for simulation and control of robot systems used in research, education, and practical robotics applications. Official documentation introduces compilation guides, device and scene interfaces, and API reference material for the robotics toolkit.
RocksDB is an embeddable, persistent key-value store optimized for fast storage engines. Maintained as an open-source C++ library, it targets log-structured workloads and integrates with services that need low-latency local storage.
Free
API available
Checked Oct 4, 2026
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