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General LLM tools include frameworks, APIs, evaluation utilities, and infrastructure specifically built around large language models. This category covers 369 tools that help developers build, test, fine-tune, and run applications on top of LLMs, from embedding calculators to full model-serving platforms.

Desktop

LOVO

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Text-to-speech with 500+ voices in 100 languages

Free 48 · 7,425 votes

StealthWriter

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Rewrite AI-generated text to sound human

Free From $20 47 · 53,000 votes

Vast.ai

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Rent GPUs for AI, machine learning, and rendering

From $5 47 · 15,087 votes

Magiclight.AI

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Turn text prompts into AI-generated videos

Free 46 · 27,602 votes

Superwhisper

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Voice-to-text for Mac, Windows, iOS

Free From $8.49 44 · 55,341 votes

Luvvoice

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Voice generation and cloning from text

Paid 42 · 16,420 votes

Tolgee

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App translation with full context and human review

Free 41 · 39,787 votes

HumanizeAI.io

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Convert AI text to natural, human-like writing

Free 41 · 12,898 votes

Steve AI

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Create animated videos from images, text, or ideas

Paid 41 · 11,695 votes

Letterly App

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Voice-to-text transcription for notes and messages

Free 41 · 60,918 votes

Formula Bot

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Generate Excel formulas and analyze spreadsheets without coding

Free 40 · 16,504 votes

Tiptap

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Open-source rich text editor framework with extensions

Free 40 · 18,071 votes

Write like a native speaker

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Get instant feedback on your writing to sound more natural

Paid 38 · 23,079 votes

HumanizerPro

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Make AI-generated text sound natural and human-like

Paid 38 · 60,024 votes

GetBotz

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Publish 50+ SEO-optimized articles monthly with full automation

Paid 38 · 59,575 votes

SRT Subtitle Translator

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Translate subtitles in SRT, VTT, MP3, MP4, and WAV files

Free 38 · 59,802 votes

HideMyAl

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Make AI-generated text sound human and undetectable

Free 38 · 58,839 votes

HumanizeAI Tools

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Make AI text read more naturally

Free 37 · 51,528 votes

Knowstory

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Automate freight forwarding and logistics workflows

Free 37 · 51,356 votes

Fuzzy Match

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Match similar names and addresses in databases

Paid 37 · 51,287 votes

Podcraftr

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Automate podcast editing and social clips

Free 37 · 51,174 votes

EssayFlow

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AI essay writing tool for students and professionals

Free 37 · 50,963 votes

Cliplama

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Turn text ideas into videos with captions and music

Free 37 · 39,680 votes

Video Editor AI

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Edit videos with automatic subtitles and scene detection

Free 37 · 39,446 votes

This is a technically focused category aimed primarily at developers and ML engineers. Tools like Cognee and UpTrain address retrieval-augmented generation (RAG) pipelines and model evaluation, while platforms like Dstack and PeriFlow handle compute infrastructure for training and inference. Embedding Similarity Calculator and similar utilities fill narrow but useful gaps in LLM development workflows. OpenAssistant and Cerebras-GPT represent open-source or open-weight models that developers can run or fine-tune directly. When comparing options, consider whether a tool is model-agnostic or tied to a specific provider, and whether it supports the models you are already using. Latency, throughput, and cost-per-token are the metrics that matter most for production workloads. Evaluation tools are often underinvested in early projects but become critical once you are shipping to users. Many tools here are open source with paid managed versions, while others are closed SaaS products with usage-based pricing.