21st Agents SDK

YouTube is a popular online platform that allows users to enjoy videos and music they love, upload original content, and share it with friends, family, and the world. It supports video sharing and streaming across various devices and offers a vast library of user-generated and professional content.

Filmora is an AI-powered video creation and editing platform that helps creators produce professional videos faster. With built-in AI tools, users can generate scripts, create videos from text prompts, images, or audio, add AI voiceovers, subtitles, music, and effects automatically. Beyond editing, Filmora offers AI-powered workflows for Smart Short Clips, Auto Captions, Color Correction, Audio Enhancement, Background Removal, and more. Whether you're creating social media content, marketing videos, tutorials, or YouTube content, Filmora simplifies the entire production process and helps you turn ideas into polished videos in minutes.

Google’s New Benchmark is designed to rank the best AI models specifically for building Android apps. It provides a standardized way to evaluate and compare AI models based on their performance in Android app development tasks, helping developers and researchers identify the most effective AI solutions for mobile applications.

SweetTalk AI offers AI companions with real personalities, real photos, and real conversations. These companions are available any time, endlessly patient, and entirely personalized to the user. The platform uses cutting-edge Flux LoRA models to generate photorealistic and unique companion images, remembers everything you say with persistent memory, and is always online without judgment.

PlanCheckerPro is a plan review tool built for architects, contractors, designers, and permit expeditors. Users upload a PDF plan set, enter a project address, and receive a categorized punchlist of potential code issues before submitting to the building department. The review checks drawings against ICC standards including IBC, IFC, IMC, and IPC, plus jurisdiction-specific codes where applicable, including Title 24, CALGreen, NFPA 13 and 72, ADA accessibility standards, and ASCE 7. Results are organized into categories that mirror how building departments route submittals across disciplines: structural, fire protection, mechanical, plumbing, accessibility, energy compliance, and site. Each finding is tagged by severity: Critical, High, Medium, or Minor. The punchlist is shareable via link without requiring recipients to log in. Team plans include collaboration tools, comments, and punchlist tracking. A free preview run is available with no credit card required. Paid plans start at $41.30 per month.

AnswerThis is an all-in-one AI research assistant built for students, academics, scientists, consultants, and professionals who need faster, smarter, and citation-backed research workflows. Unlike generic AI tools, AnswerThis is designed specifically for academic and scientific work—helping users search evidence, analyze literature, write drafts, organize sources, and uncover research gaps in one platform. With access to a database of 300M+ research papers, AnswerThis helps users instantly find credible sources, summarize complex topics, and generate structured outputs such as literature reviews, case studies, reports, and research drafts. Every output is backed by citations, making it ideal for serious research where accuracy and source transparency matter. Key Features: 1. AI Literature Reviews Generate comprehensive, publication-style literature reviews in minutes with line-by-line citations linked to source papers. 2. Advanced Evidence Search Search across 300M+ papers using intelligent filters to find top journals, relevant studies, and trustworthy evidence quickly. 3. Research Gap Finder Identify unexplored topics, missing angles, and future opportunities in your domain using AI-powered gap analysis. 4. AI Writing Assistant Draft papers, grants, case studies, slides, and rebuttals with built-in source support and smart editing tools. 5. Citation Management Supports 2000+ citation styles including APA, MLA, Chicago, and more for seamless academic formatting. 6. PDF Chat & Library Upload PDFs, chat with documents, extract insights, and keep all papers organized in one searchable research library. 7. Bibliometric Analysis Track top authors, trending keywords, journals, impact metrics, and concept relationships in your field. 8. Data Extraction & Export Extract methodology, findings, outcomes, and key details into structured tables or CSV files for analysis. 9. Collaboration Ready Create shared folders, workspaces, and team libraries for research groups and organizations. 10. Enterprise Grade Security Ideal for pharma, biotech, and regulatory teams with secure workflows, compliance-first systems, and private data handling. Why Users Love AnswerThis: * Saves hours of manual literature searching * Produces accurate, source-backed academic content * Replaces multiple tools with one workflow * Helps students complete dissertations and theses faster * Supports researchers with real evidence, not generic AI guesses * Great for universities, medical professionals, consultants, and R&D teams Best For: Researchers, PhD scholars, university students, professors, healthcare professionals, biotech teams, consultants, policy analysts, and anyone doing evidence-based writing or analysis. AnswerThis is one of the most complete AI research platforms available today. If your work depends on papers, citations, evidence, or academic writing, this tool can dramatically improve productivity while maintaining research quality and credibility.

Banana AI is an AI image generator that allows users to create AI images by chatting without the need for prompt engineering. It is designed specifically for e-commerce, creators, and marketers, enabling them to generate images easily and efficiently. The platform offers a free start to users, making AI image creation accessible and straightforward.

LocalRAG is an AI chat tool designed for interacting with various document formats such as PDFs, EPUBs, and Word documents. It emphasizes on-device processing to ensure user privacy and is available on iOS devices, providing a secure and private way to chat with your documents.

KikiVoice is a free, creator-first AI voice cloning + TTS platform. No sign-up—upload a few seconds of audio, paste text, and generate natural voiceovers in minutes with up to 99% similarity. Pick 3 built-in models: Kiki Core (fast & stable), Kiki Pro (emotion + advanced controls), and Kiki Multilingual (75+ languages + accents). Seamlessly switch models for drafts, pro production, and multilingual localization.

The Javascript to Typescript Converter with ChatGPT is a tool that allows users to quickly and easily convert Javascript code into Typescript. By leveraging AI technology, the tool automates the conversion process, saving users time and effort. The tool offers a simple and intuitive user interface where users can paste their Javascript code into a designated code box. After clicking the "Convert Now" button, the AI algorithm takes over and performs the conversion in a matter of seconds. Once the conversion is complete, users can easily copy the resulting Typescript code from the output box. Additionally, users have the option to start over with new code if needed. Developed by Yuval Suede, this tool aims to streamline the process of migrating Javascript projects to Typescript, allowing developers to take advantage of the benefits that Typescript offers, such as static typing and enhanced code safety.Overall, the Javascript to Typescript Converter with ChatGPT offers a convenient solution for developers looking to convert their Javascript codebase to Typescript with speed and efficiency.