Circle of Fifths

Speak, expand and reuse text in any app with AI voice typing, snippets and clipboard history.

Free online vocal range test — discover your voice type and range in about a minute. No account, no recording.

Voice AI built on self-trained speech models, with agents answering in about 0.6 seconds for around 5 cents a minute.

Apple's built-in AI voice assistant for asking questions, setting reminders, controlling smart home devices, and running automations by voice or text.

Voice-first AI task manager that turns spoken thoughts into organized tasks with dates, projects and reminders across Mac, Windows, web, mobile and watches.

An AI phone assistant that dials, navigates menus, waits on hold and talks — then reports back with a transcript.

Translate manga online with AI, supporting over 50 languages while preserving artwork, speech bubbles, and layout for a seamless reading experience.

Free AI caption generator that allows users to add subtitles to any video in seconds, supporting auto captions in 100 languages with free translation

Vocabulary trainer for iPhone and iPad for people past B1, with translations, example sentences and spaced repetition.

Manhwa Translator batch-translates comics and gives studios an online editor and API.

A Ficory LLC traduz mangás em lote com IA e oferece edição visual e API para estúdios.

AI 만화 번역기는 개인과 스튜디오의 만화 번역, 편집 및 API 작업을 지원합니다.

Free browser strategy game: rise from stone tools to designing your own chips, with AI agents able to play alongside via MCP.

AI-assisted trading replay simulator with feedback after each replay

cosskill is an AI communication simulator for rehearsing high-stakes conversations — salary negotiations, performance feedback, difficult personal talks — by speaking with realistic AI personas before they happen.

Find candidate HS codes, check missing country of origin, estimate duty inputs, and prepare customs document drafts for ecommerce catalogs.

LoadTester is a web-based HTTP and API load testing tool for running tests, monitoring latency, comparing results, and catching performance regression

Hundred times copy and paste tool is simply defined by name that in our tool people can generate texts multiple times, our tool name is hundred times but here you can generate texts up 10,000 times, nowadays some things are feeling boring, not excitement, if you SMS any friend or relative on a any special day like birthday or something else, don't sent in a boring way just like hi, hello, I miss you, send them in a unique way with our tool.

Open-source human approval layer that puts high-risk AI agent tool calls behind human review.

Export Outlook Emails, Contacts, Calendars, into Multiple Formats

Smart Email Backup & Migration for Multiple Accounts and Platforms

Google's newest frontier model for coding and cyber defense; limited to vetted defenders for now, not public yet.

Open search engine for domain research & OSINT — 38.5M domains scanned

Independent third-party auditing that simulates your AI agent and reports misalignment with proof.

Separate vocals and instrumentals online for karaoke and music practice, with free anonymous use and WAV downloads.

Free online vocal range test — discover your voice type and range in about a minute. No account, no recording.

AI music platform: stem separation, chords, pitch and tempo control.

Turn a piano recording into sheet music, MIDI and MusicXML — first 30 seconds free in your browser.

LumiMusic is an AI music creation platform that turns a text prompt or lyrics into a full vocal or instrumental song, then lets people refine and share the track in one workspace.

FlowMusic AI turns one sentence into a finished song, arranged, performed and mixed, with a chorus and a real ending. Cover, extend, split and clone too.