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Koofr is a cloud storage service offering tools for file organization, productivity and online collaboration. It is accessible through the web, desktop, mobile, WebDAV protocol or Rclone, without individual file size or file type limits. Koofr Vault is described as an open source, client-side, zero-knowledge encrypted storage application by Koofr.
Kopia is an open-source backup and restore tool. It creates encrypted snapshots of designated files and directories and saves them to cloud, network, or local storage. It offers command-line and graphical interfaces and supports compression, deduplication, and error correction.
KPopMusicDownload helps download, archive, convert, or manage audio and music files from supported sources.
Kraken Wallet is a multi-chain self-custody crypto wallet from Kraken. It lets users track crypto, tokenized assets, NFTs and DeFi positions, swap and bridge tokens across networks, deposit to vaults and earn onchain. It supports seed phrase and embedded wallets, plus watch-only wallets, and is available on web and mobile. The source states it is free to use and available on iOS and Android.
Krita is a free and open source painting program made by artists, licensed as GNU GPL. It provides multiple brush types and brush engines, layers, drawing assistants, stabilizers, vector and text tools, and 2D animation features through a customizable interface with dockers and dark and light themes.
Kryptor is a free, open source file encryption and signing tool for Windows, Linux, and macOS. It is designed as a simple, modern, and user-friendly alternative to GPG, age, and Minisign. Pre-built binaries are available for x64 and ARM64 architectures across supported operating systems.
Ktisis is a Current Research Information System at the Cyprus University of Technology. It gathers digital material about the university's activities, especially original research produced by its members, and preserves and promotes that scientific research to local and international communities. It runs on DSpace-CRIS, a free and open-source research information management system.
Kubeflow is described as the cloud native AI platform, composed of modular open source projects forming a Kubernetes-native stack for data and AI workloads. Its subprojects include Kubeflow Pipelines for building and deploying portable machine learning workflows, Kubeflow Trainer for distributed AI training and LLM fine-tuning, Kubeflow Katib for automated machine learning, Kubeflow Notebooks for interactive development environments, and Kubeflow Hub for indexing models and metadata. It is a Cloud Native Computing Foundation project.
KubeStellar Console is an open-source multi-cluster Kubernetes management dashboard. It allows users to monitor clusters, deploy workloads, manage GPU resources, and troubleshoot with AI-powered missions across all your Kubernetes environments.
Kutt is a free, open source modern URL shortener. It supports custom domains, link management, usage statistics, an API for programmatic access, and offers browser extensions for Chrome and Firefox, with options to self-host the service.
Kyso was a universal aggregator for all research formats that ceased operation on September 31, 2023, and is now maintained as an open source project. It launched in 2018 to help the data science community share insights and address collaboration challenges across varied workflows and tools, with an initial focus on Jupyter Notebooks. During its operation, it served thousands of users and hundreds of organizations.
L2BEAT Publications is a crypto media or research source for news, analysis, and blockchain market updates.
LAADS DAAC is NASA's Level-1 and Atmosphere Archive & Distribution System, providing access to atmospheric data such as clouds, water vapor and aerosols, plus instrument data from NASA, NOAA and ESA missions. It also serves as a backup source for MODIS and VIIRS land products.
Labelbuddy is a desktop application for text labelling, tagging spans of text with different labels. According to its documentation page, it is an open-source, lightweight application supporting sequence labelling with predefined labels or free-form annotations. It can be installed on Linux, Windows or MacOS, and data can be imported and exported using JSON, JSONLines or plain text formats.
Label Studio is an open source data labeling and annotation platform for multi-modal data, including text, images, audio and time series. It lists uses such as LLM and agent evaluation, computer vision, NLP and document tasks, and audio transcription. It offers API, Python SDK and webhooks, and is available via pip, Homebrew, Git and Docker.
Search the web and indexed online sources through a focused search interface.
Open-source project that catalogs AI services and resources for browsing by feature or use case.
LAMMPS is a classical molecular dynamics simulator focused on materials modeling, distributed as open source under GPLv2. It provides potentials for solid-state materials and soft matter, and can model atoms or act as a parallel particle simulator at atomic, meso or continuum scale. It runs on single processors or in parallel using message-passing techniques, with some models accelerated on CPUs and GPUs.
Lanemu P2P VPN is a server-less, decentralized virtual private network offered as an open-source alternative to Hamachi, Radmin, and ZeroTier. The project is written in Java and C and lists Linux, Windows, FreeBSD, and MacOS among its supported platforms.
LangChain is an open agent engineering platform that enables organizations to own, control, govern, and compound their intelligence. Its LangSmith platform offers tools for autonomous agent improvement, observability, performance evaluation, production deployment, safe code execution sandboxes, LLM call control, and no-code agent creation. The platform also provides open source agent frameworks including deepagents, langgraph, and langchain.
A collaborative AI workspace, built on your company context. Build and orchestrate agents right alongside your team.
Langfuse is an open source platform for tracing, evaluating and improving AI agents. It connects tracing, monitoring, datasets, experiments and evaluation in one continuous loop, capturing every LLM call, tool invocation and retrieval step. The platform includes prompt management, a playground, experiments and human annotation, and works with any language or framework supporting OpenTelemetry instrumentation.
LangX is a language exchange app for practising with native speakers who are learning the user's language. Users see people who speak the language they are learning and are learning theirs. Messages can be held to receive corrections, and a feed allows sharing moments and asking for corrections. It is free, open source and without ads, and is available on iOS, Android and web.
Lantern is a nonprofit VPN built by Brave New Software Project that bypasses censorship. Smart Routing sends blocked and unencrypted sites through the network while other traffic connects directly. It is open source, available on Android, iOS, Windows, Mac and Linux, and offers an optional Private Server mode on own hardware or cloud account.
