Visual Art

• Google Gemini (via Bard) – Google’s new multimodal AI now offers image generation. It’s free with a Google login (via Bard or the Gemini app). Users simply enter a text prompt and Gemini generates high-quality imagesbuffer.com.
• Adobe Firefly – Adobe’s text-to-image model with a free web interface. Firefly’s free plan gives users monthly credits (with watermark) to generate images from promptsbuffer.com. It’s designed to produce art and photos in various styles.
• Meta AI – Meta’s AI generates images within Facebook/Instagram and at meta.ai. It creates stylized images from text prompts, and outputs are watermarked as free samples. All features are free to usebuffer.com.
• Stable Diffusion Online – A free web UI for Stable Diffusion. This community site lets anyone generate unlimited images from text at no coststabledifffusion.com. It offers high-quality, photo-realistic or stylized results (oil painting, sketch, etc.) with no login required.
• DiffusionArt.co – A free aggregator of Stable Diffusion models. It provides many pretrained diffusion models and allows unlimited, no-signup image generation. The site advertises itself as “100% free – no signup, no credits”diffusionart.co.
• Magic Studio AI Art – A free online art generator that doesn’t require login. Its tagline is “Lightning fast, no login needed!”magicstudio.com. Users type prompts and get images instantly.

(Other notable free tools: Stable Diffusion itself is open-source (usable via local install or free HuggingFace Spaces), Craiyon (DALL·E mini), and Midjourney (limited free trial).)

Music Composition

• SongR – A free text-to-song AI platform (in beta) that generates lyrics and melodies. Users pick a genre, provide keywords, and the AI creates full song lyrics and a 1-minute AI-sung track. SongR is completely free with no registration requiredkripeshadwani.com.
• Riffusion – An open-source tool that converts text or lyrics into music. Riffusion interprets your lyrics plus style tags (e.g. “ballad, romantic”) to produce a vocal melody and accompaniment. It’s free to use (no signup)kripeshadwani.com.
• MusicGen (Meta) – Meta’s open-source music model generates short music clips from text prompts (e.g. tempo, instruments, mood). Accessible via a free Hugging Face Space, it lets anyone create and download 15-second WAV clipskripeshadwani.com. No login is needed.
• Splash Pro – An AI music maker for royalty-free tracks. The free plan lets you generate unlimited 40–60 second songs (with one custom AI voice) from text promptskripeshadwani.com. Users input style, mood, BPM, etc., and Splash Pro creates a multi-instrument music clip.

(Others include Boomy (free tier with signup), Soundful (free trial), and open-source tools like Google’s Magenta, but the above are among the top free options.)

Code Generation

• OpenAI ChatGPT (Free tier) – ChatGPT (GPT-3.5) is freely accessible at chat.openai.com and can generate and explain code. It’s “free to use” for basic coding tasksopenai.com (e.g. writing functions, debugging, translating between languages).
• Amazon CodeWhisperer – A free AI coding assistant by AWS. Its Individual tier is free for all developers: you can sign up with an email and get real-time code suggestions in IDEs. CodeWhisperer assists with Python, Java, JS, and many languages, and is free for individual useaws.amazon.com.
• Windsurf Editor (formerly Codeium) – A free AI-powered code editor and plugin. Codeium’s Windsurf IDE/tab completion is free for individual users. It offers smart code completion and chat, trained on code contexts. (See Codeium for download.)
• GitHub Copilot – AI code assistant integrated into major IDEs. It’s not fully open to all, but Copilot is free for verified students, teachers, and open-source maintainers. It autocompletes code from comments or partial input. (Requires GitHub login.)
• Replit Ghostwriter – Replit’s built-in AI code generator, free in the browser IDE. It writes and explains code in languages like Python/JS for free users.

(Also: Tabnine and CodeWP offer free tiers; LanguageTool and HuggingFace Transformers (e.g. CodeBERT) provide open models for code completion.)

Scientific Research & Discovery

• Semantic Scholar – An AI-powered academic search engine (semanticscholar.org). It uses AI to surface relevant papers, abstracts, and key phrases. Semantic Scholar is entirely free with no paywalls or premium tierstechpoint.africa.
• ResearchRabbit – A free tool for visual literature exploration. It creates interactive “paper maps” showing how research articles link, and sends alerts on new relevant papers. ResearchRabbit’s basic features (maps, tracking) are free for all researcherstechpoint.africa.
• Elicit – An AI research assistant (elicit.org) for literature reviews. You input research questions, and Elicit searches papers, extracts key findings, and summarizes them. The Basic tier is free (with limited queries)techpoint.africa.
• Connected Papers – Free graph-based paper discovery. Users give a seed paper and Connected Papers builds a visual network of related works (backward/forward citations). Its free plan allows basic visualizationstechpoint.africa.
• Iris.ai – A semantic research assistant (iris.ai). It understands paper concepts across disciplines. The platform offers a free account (limited functionality) for conceptual paper search and filteringtechpoint.africa.
• Consensus.app – An AI academic search engine. Input a scientific question and Consensus finds relevant papers and highlights consensus answers (free to try online).
• SciSpace (Typeset) – A comprehensive research assistant (typeset.io). It includes “Chat with PDF” (chat via research papers), summarization, topic finding and more. A free tier is available with PDF Q&A and summarization tools.

Science Education (Tutoring & Simulations)

• Khanmigo (Khan Academy) – A free AI tutor for math and science. Built on GPT-4, Khanmigo guides students with hints (not direct answers) and can explain concepts interactively. Access requires a (free) Khan Academy login, but no paymentkhanmigo.ai.
• MagicSchool AI – A free AI platform for educators and students (magicschool.ai). Teachers can sign up at no cost to use lesson planning, grading, and tutoring tools. MagicSchool advertises “Teachers sign up free” on its sitemagicschool.ai.
• ChatGPT – Widely used as an on-demand tutor (free tier available). Students can ask it to explain science topics, solve problems step-by-step, or generate practice questions.
• WolframAlpha – A free computational knowledge engine. While not generative AI, it computes answers and step-by-step solutions for math/science queries without charge (pro version optional).
• PhET Interactive Simulations – Free, research-backed science and math simulations (though not AI, they’re invaluable for education). Examples include physics experiment sims.

Academic Editing

• Grammarly (Free) – An AI writing assistant that checks grammar, style, and clarity. The free version includes basic writing suggestions. Grammarly explicitly states “Grammarly is a free AI writing assistant… Grammarly Free is genuinely free”grammarly.com. It rewrites text for tone and formality on any platform.
• Paperpal – A free academic writing tool by Editage. It offers real-time suggestions to improve scientific writing (language refinement, grammar, academic phrasing). Users can try it online for free (it advertises “Try Now for FREE”)paperpal.com.
• LanguageTool – An open-source grammar and style checker with a free web interface. It supports multiple languages and academic style.
• QuillBot – A free paraphrasing and summarization tool (limited to 125-word inputs on the free plan) for rewriting sentences and avoiding plagiarism.
• Hemingway Editor – A free web app that highlights complex sentences and readability issues to make writing clear.

Scientific Summarization

• TLDRThis – A free online summarizer (tldrthis.com). Paste an article or PDF and it produces a concise summary. The site header reads “SUMMARIZE NOW – IT’S FREE”tldrthis.com. It also offers browser extensions for one-click summarization.
• ChatPDF – Free AI chat for PDFs (chatpdf.com). Upload a research paper PDF and ask questions or request summaries. It bills itself as “AI-powered… make reading journal articles easier and faster… Chat with any PDF. Fast, free, and no sign-up required”chatpdf.com.
• SciSpace Research Assistant – (Typeset SciSpace) As above, it can summarize papers and answer questions via its chat interface. The free tier includes “AI research summaries” and PDF chats.
• OpenAI ChatGPT – Also useful for summaries. You can input paper text or abstracts into the free ChatGPT (3.5) and ask for summaries or explanations.
• Claude (Anthropic) – On its free plan (Claude Instant), it can read and summarize documents via its chat interface.
• Google Gemini – The free Gemini (via Google Bard) can also summarize text or papers when prompted.

Comparison Table (Overview):

Category	Top Free Tools (Links)	Key Features
Visual Art	Google Gemini, Adobe Firefly, Meta AI, Stable Diffusion Online, DiffusionArt, Magic Studio	Text-to-image generation (photorealistic and artistic), style transfers, no-cost usage (some with watermarks or limits)stabledifffusion.commagicstudio.com.
Music Composition	SongR, Riffusion, MusicGen (Meta), Splash Pro	Text-to-song or melody generation; lyric writing; royalty-free tracks; free tiers with unlimited short clips or limited outputskripeshadwani.comkripeshadwani.com.
Code Generation	OpenAI ChatGPT, AWS CodeWhisperer, Codeium/Windsurf, GitHub Copilot (free for students), Replit Ghostwriter	AI-assisted coding and completion in IDEs or chat. Free tiers offer code writing, autocompletion, and query-based coding helpopenai.comaws.amazon.com.
Scientific Research	Semantic Scholar, ResearchRabbit, Elicit, Connected Papers, Iris.ai	AI-powered literature search and analysis. Features include semantic search, visual paper maps, question-driven literature summaries, and no-cost accesstechpoint.africatechpoint.africa.
Science Education	Khanmigo, MagicSchool, ChatGPT, WolframAlpha	AI tutoring and interactive learning. Includes guided problem solving, on-demand explanations, and simulations. Platforms are free to sign upkhanmigo.aimagicschool.ai.
Academic Editing	Grammarly, Paperpal, LanguageTool, QuillBot	AI grammar/spell checking and rewriting. Free versions offer real-time writing suggestions and paraphrasing to polish academic textgrammarly.compaperpal.com.
Scientific Summarization	TLDRThis, ChatPDF, SciSpace, ChatGPT	Automated paper/article summarizers. These tools extract key points and generate concise overviews from PDFs or text prompts (free usage with limited inputs)tldrthis.comchatpdf.com.

Sources: For each tool above, refer to the cited documentation and reviewsbuffer.combuffer.comtechpoint.africaaws.amazon.comgrammarly.comtldrthis.com, which confirm features and free access. Each link provided goes directly to the respective tool or its official page.