Evernote

Notion is a productivity and collaboration platform developed by Notion Labs Inc. It combines notes, documents, relational databases, kanban boards, calendars and wikis into a single workspace for individuals and teams.

Nenspace is a web and iOS personal workspace app that combines AI-assisted working memory, tasks, notes, habits and a logbook. The service describes itself as an "extended mind" that fuses lo-fi LLM capabilities with a single space to capture and cultivate ideas. It is marketed as AI-fused and free to start.

Super Productivity is an open-source task and day-planning application with sub-tasks, projects, tags, timeboxing, time tracking, timers, work summaries, and personal productivity metrics. It can import assigned tasks from Jira, Trello, GitHub, GitLab, Gitea, OpenProject, Linear, ClickUp, Azure DevOps, and other sources while keeping planning details local. The application supports task notes, file attachments, project bookmarks, break reminders, anti-procrastination prompts, a Pomodoro timer, basic CalDAV integration, and exports for work logs and time sheets. Data can be synchronized across devices through SuperSync, Dropbox, or WebDAV; SuperSync is described as an end-to-end encrypted service that can also be self-hosted. It is available as a web application and downloadable applications, requires no account or registration, and states that it does not collect user data. The project is free and open source, with platform support including Android, iOS, Linux, macOS, and Windows.

Kept is a self-hosted notes app modeled after Google Keep. It supports text notes, checklists, images, drawings, links, attachments, labels, colors, pinned notes, search and filters, reminders, offline editing with synchronization, real-time collaboration, and Google Keep Takeout import. It includes local accounts, optional two-factor authentication, user management, database backups and restore, and native iOS and Android apps that connect to a Kept server. The web application uses an Angular frontend, a Node/Express backend, and SQLite storage, and can be deployed with Docker Compose or hosted through Railway.

Mindwtr is a free, open-source, local-first task and idea management app built around the Getting Things Done (GTD) workflow. It captures tasks, ideas, and worries in an Inbox through desktop hotkeys, mobile widgets, share sheets, or voice input; guides users through sorting items into scheduled tasks, next actions, waiting-for items, projects, and Someday/Maybe; and provides Focus and guided weekly-review views. It supports projects with sections, areas, and manual task ordering, and is available for desktop, mobile, and web use. Data is stored on the device by default, with optional synchronization through iCloud, Dropbox, shared folders, a user-owned server, or WebDAV; the project states that it requires no account or subscription.