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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 Paid

Vast.ai

general

Rent GPUs for AI, machine learning, and rendering

From $5 47 · 15,087 votes

Luvvoice

general

Voice generation and cloning from text

Paid 42 · 16,420 votes

Steve AI

general

Create animated videos from images, text, or ideas

Paid 41 · 11,695 votes

Write like a native speaker

general

Get instant feedback on your writing to sound more natural

Paid 38 · 23,079 votes

HumanizerPro

general

Make AI-generated text sound natural and human-like

Paid 38 · 60,024 votes

GetBotz

general

Publish 50+ SEO-optimized articles monthly with full automation

Paid 38 · 59,575 votes

Fuzzy Match

general

Match similar names and addresses in databases

Paid 37 · 51,287 votes

ICLight Studio

general

Adjust lighting in photos and videos with AI

Paid 37 · 36,453 votes

Wan 2.7 AI Video Maker

general

4K AI video creation with lip sync

Paid 36 · 26,347 votes

Wordfixerbot

general

Rephrase text quickly and clearly

Paid 36 · 19,303 votes

Podcast Show Notes Generator

general

Auto-generate podcast summaries

Paid 35 · 18,168 votes

Humanizey AI

general

Rewrite AI text to bypass detection

Paid 35 · 17,567 votes

HandtextAI

general

Convert typed text to realistic handwritten notes

Paid 34 · 4,482 votes

WriterTools

general

Platform for publishing technical expertise to a global audience

Paid 32 · 61,512 votes

Uthana

general

AI motion generation for characters

Paid 32 · 52,843 votes

Text to Sound Effects Online

general

Create custom sound effects from text descriptions

Paid 32 · 51,455 votes

Smart Dictate

general

Voice-to-text that understands technical terms and jargon

Paid 31 · 46,842 votes

Twixify

general

Convert AI-written text to natural, human-sounding writing

Paid 31 · 2,180 votes

LangSearch

general

Web search and semantic rerank API for LLM applications

Paid 31 · 46,762 votes

Undetectable AI Free & Bypass AI Detector

general

Bypass AI detection with one click

Paid 31 · 43,075 votes

Codev

general

Turn text descriptions into full-stack web apps

Paid 31 · 43,161 votes

SpikeX AI

general

Convert text into short videos for YouTube and social media

Paid 30 · 23,669 votes

PureCode AI

general

AI code generation for.NET teams

Paid 30 · 22,160 votes

LemonChat

general

Text and video chat with strangers worldwide, no signup required

Paid 30 · 6,870 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.