1,919 tools
Free planSoftware & utilities
Keywords Everywhere is a browser extension that surfaces SEO, PPC, YouTube, and ecommerce metrics while you browse. Marketers install the Chrome, Firefox, or Edge add-on, use several free utilities instantly, and optionally buy credit packs via annual subscriptions for full keyword volume data.
Free tier unknownSoftware & utilities
KFR is a commercial-friendly C++ digital signal processing framework offering FFT/DFT, filters, resampling, audio I/O, and math utilities optimized for SIMD on Intel, AMD, ARM, and Apple CPUs. Audio, scientific, and embedded teams embed KFR algorithms in desktop and mobile products.
Free to startSoftware & utilities
Kidtime is a co-parenting app with shared custody calendars, messaging with tone check, expense logging, recorded calls, attorney access, and court-ready PDF exports. It also offers a free web parenting-time calculator that emails printable custody schedules.
Free to startSoftware & utilities
Kill Bill is an open source subscription billing and payments platform for SaaS and marketplaces. It provides plugin-friendly invoicing, payment routing, and catalog management that teams self-host or extend for custom monetization stacks.
Free planSoftware & utilities
Kinde is a customer identity and access management platform covering authentication, user management, organizations, feature flags, billing, and customizable login experiences. It targets startups and SaaS teams with tiered MAU-based plans and optional monetization tooling.
Free tier unknownSoftware & utilities
KIN is a voice-first shared family calendar app that keeps households aligned on schedules through voice-powered planning. Marketing emphasizes family scheduling assistance rather than generic task lists.
Free trialSoftware & utilities
Kinsta provides managed WordPress hosting, application hosting, database hosting, and related cloud services with performance, security, and MyKinsta dashboard tooling. Plans scale from single-site WordPress installs to agency and enterprise portfolios with optional add-ons.
Free to startSoftware & utilities
Kirby is a file-based PHP CMS that adapts to developers, designers, and content teams without imposing a fixed database schema. Licenses are sold per site with Basic and Enterprise tiers, volume discounts, and programs for students and nonprofits.
Free planSoftware & utilities
Kiwi IRC is a web-based IRC client that embeds in browsers with themes, SSL, and support for major IRC networks. It is designed as open, hand-crafted software for chatting on Freenode-style networks without installing a desktop client.
Free planSoftware & utilities
Knot DNS is a high-performance authoritative-only DNS server from CZ.NIC supporting modern DNS and DNSSEC features. It is open source under GPL 3+, targets POSIX platforms, and is used for authoritative hosting rather than recursive resolver deployments.
Free planSoftware & utilities
Knowlify turns documents and ideas into narrated animated explainer videos through self-serve credits or a done-for-you studio. The platform targets L&D, onboarding, compliance, and marketing teams with chat-based editing, avatars, translations, and enterprise LMS integrations.
Free planSoftware & utilities
Known is an open source social publishing engine for individuals and groups to run blogs, photos, and status updates on their own domain. It supports multi-author sites, indieweb interactions, feeds, and responsive editing from any device.
Free tier unknownSoftware & utilities
Knowtify Chat is a lightweight web landing page for the Knowtify Chat product with links to mobile app stores and social profiles.
Free planSoftware & utilities
Koillection is a self-hosted website for cataloging personal collections such as items, tags, wishlists, and signs. Users can share selected collections with guests while keeping full control of data on their own server.
Free planSoftware & utilities
Komga is a self-hosted media server for comics, manga, magazines, and ebooks in CBZ, CBR, PDF, and EPUB formats. It organizes libraries, exposes OPDS and integrations, and includes metadata editing plus web and mobile reading paths.
Free planSoftware & utilities
Koyeb is a serverless-friendly cloud platform for deploying apps, databases, and GPU workloads with per-second billing and autoscaling. It offers compute instances, Postgres, global deployment, and team plans with included compute credits for production apps.
Free tier unknownSoftware & utilities
Kravatar is a gaming community feed where members explore communities, follow creators, and publish posts up to 2,000 characters. The site focuses on discovery, trending communities, and social sharing rather than generative avatar tooling.
Free planSoftware & utilities
Krayin is an open source CRM built on Laravel for managing leads, customers, and sales pipelines with extensions and industry templates. The vendor also advertises managed CRM Cloud Hosting and professional services around the core product.
Free planSoftware & utilities
Kutt is a modern URL shortener with custom domains, link statistics, password protection, and a documented HTTP API. The kutt.to service offers premium quotas while the core remains open source for self hosting.
Free planSoftware & utilities
Laminas is the open-source continuation of Zend Framework, offering enterprise PHP components and the Mezzio middleware microframework. Projects cover HTTP messaging, validation, DI, events, feeds, and PSR-compliant middleware for building modern PHP applications.
Free planSoftware & utilities
LanCache.NET provides Docker-based caching for LAN party game downloads so attendees pull updates once from a local cache instead of saturating WAN links. It includes monolithic cache containers, DNS helpers, and documentation for quick deployment.
Free planSoftware & utilities
Lando is a free, open-source local development tool maintained by the Lando Alliance nonprofit. It helps developers spin up consistent Docker-based environments for PHP, Node, and other stacks without proprietary licenses, backed by docs and community support.
Free tier unknownSoftware & utilities
LANS is a mobile app for booking coworking day passes across cities without committing to one space. Users pay for same-day access to partner workspaces nationwide, aimed at hybrid workers, founders, and travelers.
Free tier unknownSoftware & utilities
LansiAI.com responds with a minimal HTML shell and HTTP 403 bot protection that redirects browsers to the root URL, so no product features or pricing were visible in fetched official-site HTML during this check.
Showing 1,104 of 1,919 tools
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