SerpWatch is an SEO rank tracking tool for marketers and agencies. It tracks keyword rankings, sends rank-drop notifications, and includes client management, white-label client portals, report building and a local rank tracker. Pricing is based on monthly keyword checks, with plans from $29 to $199 per month billed annually.
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Server-side Rendering (SSR) Checker crawls websites to audit SEO, accessibility, performance, and technical page issues.
Shiny is an R and Python package for creating interactive web apps, letting users interact with data and analysis without web development skills. Apps can be written from R or Python. Questions are answered through Posit Community and Stack Overflow, with subscription support for hosting services.
Sigma.js is a WebGL-powered JavaScript library for interactive graph visualization, built on graphology. It provides GPU-accelerated rendering, built-in pan, zoom, hover and multi-touch interactions, and works with React, Angular, Vue or vanilla JavaScript. Layouts, metrics and community detection come via graphology's standard library.
Similarweb tracks rankings, SERP visibility, and keyword performance across search results.
SiteAnalyzer is a website crawler for technical audits and SEO optimization. It scans site pages and checks more than 60 parameters, including broken links, duplicate pages, meta tags and server response codes. It offers integrations with Google Search Console, Yandex Webmaster and Yandex Metrica, internal PageRank calculation, site structure visualization and sitemap generation. A free version and a Pro plan are available.
Sitebulb is a website crawler for SEO audits, available as desktop software and a cloud service. It reports prioritized hints, audit comparison and JavaScript crawling. Desktop crawls up to 500,000 URLs per audit; cloud supports up to 10m URLs per audit with real-time team collaboration.
Siteliner tracks rankings, SERP visibility, and keyword performance across search results.
Estimates a Twitter user’s likely sleep schedule from posting times and activity patterns.
Analyzes structured data and helps produce queries, insights or visualizations.
SmartLnks is a free secure smart link generator and URL shortener. The platform offers link creation and targeting features, a browser extension, link scanning, preview and analytics tools, and is marketed as a solution for maximizing link clicks and capturing conversions.
Snowpixel is a creative studio for generating AI videos, music, sound effects, images, and 3D objects from prompts and source media. It offers text-to-video, image-to-video, AI music, text-to-3D, and still generation within one workspace. Credit packs start at $10 USD for 50 credits and $45 USD for 250 credits.
Social Blade tracks daily statistics and growth for content creators across YouTube, Instagram, TikTok, Twitch and Facebook. Users can compare accounts and analyze growth, and top lists show popular creators per platform. Paid memberships remove ads and unlock historical data, charts and report cards.
Search engine for Reddit posts and comments with filters for keywords, users, and subreddits.
Socialsonic is an AI LinkedIn growth platform by Writesonic. It provides trend discovery, AI-assisted content creation, post scheduling and thought-leader discovery. It also offers gamified consistency tracking and performance analytics. A 7-day free trial is available without a credit card.
Apache Spark is a multi-language engine for executing data engineering, data science, and machine learning on single-node machines or clusters. It provides high-level APIs in Java, Scala, Python and R, and supports Spark SQL, pandas API on Spark, MLlib, GraphX and Structured Streaming. The documentation covers downloads, the shell and client applications.
Springboard is an education technology company that offers online career tracks in data science, machine learning, artificial intelligence, cybersecurity, software engineering, and UX design. Its blog provides articles on certifications, skill building, and career planning. The platform also partners with employers to hire emerging talent and offers team upskilling solutions.
SpyFu is a competitor keyword research tool for Google Ads PPC and SEO. It allows users to view competitors' PPC and SEO keywords, ad tests, backlink profiles, and includes AI-powered site audits, daily performance tracking and an API.
An open source tool for running arbitrary queries against public data from the Stack Exchange network.
Staking Rewards is an independent rating platform for staking and on-chain yield. It compares verified providers across tracked assets, grading staking infrastructure providers and DeFi protocols on a single AAA–D scale intended to express downside risk.
A data and trends page from PeptaHub presenting statistics on peptide compounds, covering legal status, research evidence, administration routes and categories. The page states that 156 peptide profiles were analyzed across 10 therapeutic categories, 5 legal classifications and 6 routes of administration, with the dataset available as JSON and CSV downloads under CC BY 4.0.
stolen.shoes is a video embed generator and link generator. The generator is provided by hackerman.xyz, and the site states that it does not host any of the content embedded or redirected through it.
Portal offering three explorers for the Stratos Chain. Big Dipper is described as the most complete explorer, suited to historical research, validator analytics and governance proposals, and can be slower to load. Web3 Explorer, powered by Blockscout, covers EVM transactions, smart contract interactions and token transfers. Ping.pub is a lightweight explorer for quick checks on recent blocks.
StudyCraft is an open source, free study tool available for Windows, MacOS and Linux. It allows users to import study materials including PDFs, Markdown files, webpages and GitHub repositories, which are automatically indexed into a vector database for semantic search. Users can customize their imported content, and the tool automatically generates flashcard decks and practice tests, plus provides study session analytics to track progress. It supports self-hosted and cloud-hosted large language model integrations and is built for fast performance.