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Free alternatives to core

50 free AI Skills apps to use instead, best rated first.

Top picks

  1. W

    webapp-testing

    Launch

    Native Python Playwright scripts for testing local web applications with server lifecycle management. Includes with_server.py helper to automatically start and manage single or multiple servers before running automation scripts. Supports re

  2. C

    content-research-writer

    Launch

    Assists in writing high-quality content by conducting research, adding citations, improving hooks, iterating on outlines, and providing real-time feedback on

  3. O

    openhue

    Launch

    openhue is an agent skill from the OpenClaw project, listed on skills.sh. It lets an agent control Philips Hue lights and scenes through a Hue Bridge with the OpenHue CLI: turn lights on and off, dim rooms, set scenes such as movie mode, an

  4. B

    batch-grill-me

    Launch

    batch-grill-me is an agent skill from Matt Pocock's skills collection, listed on skills.sh. It interviews you relentlessly about a plan until you share an understanding. It maps decisions as a tree and asks every question it can answer now

  5. I

    implement

    Launch

    implement is an agent skill from Matt Pocock's skills collection, listed on skills.sh. It implements work from a spec or tickets: it fetches the ticket, works test-first at agreed seams, runs type checks and tests as it goes, reviews the re

  6. F

    frontend-design

    Launch

    Distinctive, production-grade frontend interfaces that reject generic AI aesthetics through intentional design choices. Guides aesthetic direction selection (brutalist, maximalist, retro-futuristic, luxury, organic, etc.) before implementat

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7
A

artifacts-builder

Suite of tools for creating elaborate

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8
C

canvas-design

Design beautiful visual art in .png and .pdf formats using design philosophies

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9
M

mcp-builder

Guide for creating high-quality MCP servers to integrate external APIs

Launch
10
P

pdf

Extract text, tables, metadata, merge & annotate PDFs

Launch
11
X

xlsx

Spreadsheet manipulation: formulas, charts, data transformations

Launch
12
F

find-skills

Discover and install specialized agent skills from the open ecosystem

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13
B

brainstorming

Transform rough ideas into fully-formed designs through structured questioning

Launch
14
F

finishing-a-development-branch

Guides completion of development work by presenting clear options

Launch
15
S

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior

Launch
16
T

test-driven-development

Use when implementing any feature or bugfix, before writing implementation code

Launch
17
U

using-git-worktrees

Creates isolated git worktrees

Launch
18
1

1password

Set up and use 1Password CLI for sign-in, desktop integration

Launch
19
A

apple-notes

Create, view, edit, delete, search, move, or export Apple Notes

Launch
20
A

apple-reminders

List, add, edit, complete, or delete Apple Reminders and reminder lists

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21
B

bear-notes

Create, search, and manage Bear notes via grizzly CLI

Launch
22
B

blogwatcher

Monitor blogs and RSS/Atom feeds for updates using the blogwatcher CLI

Launch
23
B

blucli

BluOS CLI (blu) for discovery, playback, grouping, and volume

Launch
24
C

camsnap

Capture frames or clips from RTSP/ONVIF cameras and local webcams

Launch
25
C

clawhub

Search ClawHub for plugins by default, or skills when explicitly requested

Launch
26
C

coding-agent

Delegate coding work to Codex, Claude Code, or OpenCode as background workers

Launch
27
D

discord

Discord messaging workflows through OpenClaw's message tool

Launch
28
E

eightctl

Control Eight Sleep pods (status, temperature, alarms, schedules)

Launch
29
G

gemini

Gemini CLI one-shot prompts, summaries, generation, skills, hooks, MCP

Launch
30
G

gh-issues

Fetch GitHub issues, select candidates, spawn background fix agents, open PRs

Launch
31
G

gifgrep

Search GIF providers with CLI/TUI, download results, and extract stills/sheets

Launch
32
G

github

GitHub CLI for issues, PRs, CI/check logs, comments, reviews, releases, repos

Launch
33
G

gog

Google Workspace CLI for Gmail, Calendar, Drive, Contacts, Sheets, and Docs

Launch
34
G

goplaces

Query Google Places for text search, place details, resolve, reviews

Launch
35
H

healthcheck

Audit/harden OpenClaw hosts: SSH, firewall, updates, exposure, backups

Launch
36
H

himalaya

Himalaya CLI for IMAP/SMTP mail: list, read, search, compose, reply, forward

Launch
37
I

imsg

Use the imsg CLI from OpenClaw agents for iMessage/SMS DMs, groups, replies

Launch
38
M

mcporter

List, configure, authenticate, call, and inspect MCP servers/tools

Launch
39
M

model-usage

Summarize CodexBar local cost logs by model for Codex or Claude

Launch
40
N

nano-pdf

Edit PDFs with natural-language instructions using the nano-pdf CLI

Launch
41
N

notion

Notion CLI/API for pages, Markdown content, data sources, files, comments

Launch
42
O

obsidian

Work with Obsidian vaults

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43
O

openai-whisper

Local speech-to-text with the Whisper CLI (no API key)

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44
O

openai-whisper-api

OpenAI Audio Transcriptions API via curl

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45
O

oracle

Oracle CLI second-model review/debug/refactor/design

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46
O

ordercli

Foodora-only CLI for checking past orders and active order status

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47
P

peekaboo

Capture and automate macOS UI with the Peekaboo CLI

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48
S

sag

ElevenLabs text-to-speech with mac-style say UX

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49
S

session-logs

Search and analyze your own session logs (older/parent conversations) using jq

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50
S

sherpa-onnx-tts

Local text-to-speech via sherpa-onnx (offline, no cloud)

Launch

About core

C

core

Core package for defining schemas, catalogs

core is the foundation package of json-render, which works with specs that are JSON output from an AI and conform to a schema. It provides the building blocks for defining that structure. A schema defines the structure of specs and catalogs, and you create one with defineSchema. A catalog maps component and action names to their definitions, and you build one with defineCatalog. A spec is the JSON an AI produces that matches the schema. SpecStream is a JSONL streaming format for building a spec progressively as its pieces arrive. The package also covers AI prompt generation from a catalog. It includes two experimental decision-model composition APIs, experimental_composeSpec and experimental_createEvaluator, which the project says are unreleased. Until they are published, they should be used from a source build, and experimental exports and Experimental_ types can change in any release, so you should pin exact versions once they ship. The skill is for work with @json-render/core, and it is installed with npx skills from the vercel-labs/json-render repository. Its security audits all pass.

View coreAll AI Skills apps
Price
Free
Made by
vercel-labs
Category
AI Skills
Website
github.com/vercel-labs/json-render/core