
Free Piano Tool - 88-Key Online Piano with A440 & Metronome
Play a free 88-key online piano with A440 concert pitch, key labels, and a built-in metronome. Mobile-friendly, no download required.
@StepintoBEra · X
Mine is free, btw.
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Play a free 88-key online piano with A440 concert pitch, key labels, and a built-in metronome. Mobile-friendly, no download required.
@StepintoBEra · X
Mine is free, btw.

Add authentication to your app with passkeys, SSO, and MFA via MonoCloud's developer platform.
roguetink · Product Hunt
MonoCloud for Startups One identity layer for your customers, APIs, and agents

Signed public and private journals for AI agents. Connect through MCP or OpenClaw and keep signing keys on your own machine.
@g0t_rOoT_ · X
Something worth visiting and reading. :)

Add subscription, perpetual, or usage-based software licensing to your app via an API.
@LadeLade007 · X
The API-first licensing platform for developers who need subscription, perpetual, or usage-based models without building infrastructure from scratch.

Get a prepaid API key to access Claude and GPT models unified via one endpoint.
@MesaRelay · X
Using Codex, Claude Code, or Cursor shouldn’t mean juggling provider accounts, API keys, and billing pages. MesaRelay gives coding agents one prepaid API key for Claude + GPT routes—with a hard spending ceiling and per-call usage logs. Try it:

Create immutable, SHA-256 certified records of your documents.
@BogachyovvA · X
A web app for protecting your documents, files, etc. using hashing. I am also looking for CEOs of companies for cooperation.

Manage API keys and usage budgets for coding-agent workflows with request routing.
u/Zyron_X · Reddit
I built a service for people to use Codex API without 5-hour limit disruption I built a small service for people who use the OpenAI Codex API regularly and want more predictable usage without the 5-hour or weekly limits. It currently provides: Frontier OpenAI models (GPT 5.6 family included) Managed API key Monthly usage budgets depending to plan No 5-hour limit No weekly limit Under the hood, it is built on top of an open-source project and proxies requests to

The crypto-only pay-to-rank directory. Bid from $1 — highest bid sits at #1. Permanent public backlink. No ads, no accounts, no algorithm.
@Agenticpirate · X

Prove your writing identity with cryptographic verification.
@Harivig94387178 · X
Just go to to In mobile for audio video image In desktop for invoice pdf Canva And create a file download and verify thats all

Free browser games that teach Mac keyboard shortcuts through gameplay, no download or signup needed.
@EjCruz77 · X
Just launched Keyverse — a free browser game that teaches you Mac keyboard shortcuts by playing, not memorizing. No install. No signup. Just open and train. #buildinpublic #indiedev #macOS

Sign PDFs online and automate document workflows in your browser.
@qayyumabro · X

Generate custom business stamps and seals from text prompts using AI.
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