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microMathematics

github.com

microMathematics Plus is an open-source Android scientific graphing calculator and function plotter oriented around worksheets. It enables users to perform mathematical calculations in naturally readable form, create interactive formula collections, edit mathematical identities live with high accuracy, and store documents containing formulas, plots, text and images. The app includes no ads, trackers or telemetry, supports common mathematical operations and SI and non-SI units, and works on smartphones and tablets in portrait and landscape modes.

Miniflux

miniflux.app

Miniflux is a minimalist, opinionated, self-hostable feed reader. It is lightweight, optimized for readability, and automatically fetches original article content for feeds that only display summaries. The reader removes pixel trackers and tracking parameters from URLs, uses a media proxy to prevent third-party tracking, has no telemetry or advertising, and supports keyboard shortcuts for navigation. Paid hosting is available for $15 per year with a 15-day trial period.

Motus Wildlife Tracking System

motus.org

Motus is an international collaborative research network that uses automated radio telemetry to track the movement and behaviour of small animals such as birds, bats and insects. It is a program of Birds Canada run with collaborating researchers and organizations, and it provides data and information for researchers.

Mullvad Browser

mullvad.net

Mullvad Browser is an open-source, free-of-charge web browser developed by Mullvad VPN and the Tor Project to minimize tracking and fingerprinting. It blocks third-party trackers using uBlock Origin, enables private mode by default, saves no cookies between sessions, and collects no telemetry. It can be used with or without a VPN.

NETworkManager

borntoberoot.net

NETworkManager is a free, open-source tool for managing networks and troubleshooting network problems. It includes 28 built-in tools such as an IP scanner, port scanner, ping monitor, DNS lookup, remote desktop and PowerShell in a single interface. It offers profiles for organizing hosts, and no license, subscription or telemetry.

NormCap

dynobo.github.io

NormCap is an OCR-powered screenshot tool that captures text instead of images. It uses Tesseract language models for text detection and supports QR and barcode scanning. Detection is performed on the device and no telemetry data is collected. It is available for Windows, macOS and Linux and is licensed under GPLv3.

Ocean Tracking Network

members.oceantrack.org

The Ocean Tracking Network is an aquatic animal tracking, data management, and partnership platform based at Dalhousie University in Canada. Its data centre collects, aggregates, cross-references, preserves, and disseminates aquatic telemetry data, and aims to inform global biogeographical information systems such as OBIS as data becomes publicly accessible under the OTN Data Policy. A map lists affiliated projects filterable by collection, contact, country, or species.

Odysseus is a self-hosted AI workspace for running language models on one's own hardware. It offers chat, autonomous agents, tools and MCP connections, model serving, an email assistant, deep research, model comparison and persistent memory. The project is described as local-first and privacy-first, with no telemetry.

OISD

oisd.nl

OISD is a domain blocklist that prevents devices from connecting to unwanted or harmful domains. It aims to reduce ads, lower malware risk and enhance privacy, prioritizing functionality over blocking. The big list blocks ads, phishing, malvertising, malware, spyware, ransomware, cryptojacking and telemetry or tracking, while a separate NSFW list blocks porn, adult, shock and gore domains. Support for HOSTS and domains syntax was discontinued starting January 1st, 2024.

onWatch

github.com

onWatch is an open-source tool developed by onllm-dev that tracks AI API quotas for services including Synthetic, Z.ai, Anthropic Claude Code, Codex, GitHub Copilot and Antigravity in real time. It functions as a lightweight background daemon that uses less than 50MB of RAM, stores data in SQLite, and provides a Material Design 3 dashboard. The tool does not collect telemetry.

Skills

skills.sh

Skills is a directory for discovering and installing skills for AI agents. Skills are reusable capabilities that provide procedural knowledge helping agents accomplish specific tasks more effectively. Installation uses a skills CLI command, and the leaderboard ranks skills based on anonymous telemetry data collected from that CLI.

SpaceDrive

spacedrive.com

Spacedrive is a local-first app that connects files, clouds, devices, and sources in one place for browsing and searching. The native version is described as running entirely on the computer, with no cloud, account, subscription, or telemetry. Optional agents can be enabled to work across the data.

stegano

bztsrc.gitlab.io

Steganography is an open-source browser tool for hiding encrypted messages inside images. Users supply an image by URL or local file in WEBP, PNG, GIF or JPEG format and an optional password; the output image is saved in WEBP format. The page runs with no ads, logs, telemetry or server components.

SVG Studio is a free, browser-based SVG animation editor with no sign-up and no telemetry. It provides a keyframe timeline, animatable position, rotation, scale and opacity properties, SVG import, easing functions, loop control and export of self-contained animated SVGs with embedded CSS keyframes.

TaskSlinger

taskslinger.net

TaskSlinger is a native Windows task manager replacement written in C and Win32 with a custom Direct3D UI. It offers process monitoring, performance graphs, services, startup apps and network connections, plus process module and token inspection, process dumping and search and filtering. The free beta runs on Windows 10/11 x64 and sends no telemetry.

VSCodium

vscodium.com

VSCodium is a community-driven, freely-licensed binary distribution of Microsoft's editor VS Code. It provides build scripts that clone Microsoft's vscode repository and upload resulting binaries, with telemetry disabled, so users do not have to download and build from source. It is available for Windows, Mac OS and Linux, including through package managers such as Brew, WinGet, Chocolatey, Scoop and snap.

Windows Install / Debloat Guide

wispydocs.pages.dev

Guide covering how to install, activate, optimize, and use Windows 10 and 11. It recommends editions such as Windows 11 Enterprise and Windows 11 IoT Enterprise LTSC, and covers clean installation, in-place upgrade or repair, activation, changing editions, disabling telemetry, and uninstalling Edge. It also mentions Linux Mint as an alternative.

YouTube Search Fixer

phoennix.gitlab.io

YouTube Search Fixer is a free, open-source browser extension that removes Shorts, Mixes, playlists, suggestions and clickbait text from YouTube search results. It also offers search and layout tools, including Power Search and a grid view. The developers state it collects no telemetry and requires no account.