#1
:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.
18K starsJun 15, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add Foundry376/MailspringAlternatives
Deer alternatives for AI agents.
Compare similar skills by workflow fit, trust score, quality, GitHub adoption, maintenance, and install readiness.
Current skill
Deer
:pencil2:A modern, fast, beautiful note taking app, built on Electron and React
51
Quality
71
Trust
325
Stars
#2
A fully open source & end-to-end encrypted note taking alternative to Evernote.
14K starsJun 16, 2026 pushproductivity-automationTypeScriptProductivity
$ npx skills add streetwriters/notesnook#3
A Privacy-first, Cross-platform Text Expander written in Rust
14K starsJun 14, 2026 pushproductivity-automationRustProductivity
$ npx skills add espanso/espanso#4
A self-contained JavaScript wiki for the browser, Node.js, AWS Lambda etc.
8.6K starsJun 20, 2026 pushproductivity-automationJavaScriptNotes
$ npx skills add TiddlyWiki/TiddlyWiki5#5
The best free and open-source automated time tracker. Cross-platform, extensible, privacy-focused.
19K starsAug 6, 2026 pushproductivity-automationPythonProductivity
$ npx skills add ActivityWatch/activitywatch#6
MJML: the only framework that makes responsive-email easy
18K starsJun 12, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add mjmlio/mjml#7
A Cloudflare-based email service | 基于 Cloudflare 的邮箱服务 | Cloudflare Email 邮箱 Mail
11K starsJun 9, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add maillab/cloud-mail#8
✉️ Send e-mails with Node.JS – easy as cake!
18K starsJun 15, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add nodemailer/nodemailer#9
Window management made elegant.
11K starsJun 13, 2026 pushproductivity-automationSwiftProductivity
$ npx skills add mrkai77/Loop#10
The free and privacy-friendly screen recorder with no limits 🎥
18K starsAug 18, 2026 pushproductivity-automationJavaScriptProductivity
$ npx skills add alyssaxuu/screenity#11
MacOS Niri and Hyprland inspired tiling window manager that's developer signed and notorized (safe for managed enterprise environments). Aiming for parity and extra innovation.
3.2K starsOct 5, 2026 pushproductivity-automationSwiftProductivity
$ npx skills add BarutSRB/Hiro#12
MacOS Niri and Hyprland inspired tiling window manager that's developer signed and notorized (safe for managed enterprise environments). Aiming for parity and extra innovation.
3.2K starsOct 5, 2026 pushproductivity-automationSwiftProductivity
$ npx skills add BarutSRB/OmniWM#13
Juice inlines CSS stylesheets into your HTML source.
3.3K starsSep 24, 2026 pushproductivity-automationJavaScriptEmail
$ npx skills add Automattic/juice#14
A next.js web application that integrates AI capabilities with draw.io diagrams. This app allows you to create, modify, and enhance diagrams through natural language commands and AI-assisted visualization.
32K starsJun 16, 2026 pushproductivity-automationTypeScriptProductivity
$ npx skills add DayuanJiang/next-ai-draw-io#15
Low code web framework for real world applications, in Python and Javascript
10K starsJun 16, 2026 pushproductivity-automationPythonEmail
$ npx skills add frappe/frappe#16
Virtual whiteboard for sketching hand-drawn like diagrams
125K starsJun 16, 2026 pushproductivity-automationTypeScriptProductivity
$ npx skills add excalidraw/excalidrawHow to choose
When should you switch?
Use an alternative when it has a clearer install path, higher trust score, fresher maintenance, or better platform fit for your current agent stack. Keep Deer if it already passes your workflow test and repository review.
Next step
Compare top candidates side by side
Open the compare page, test the install commands in a sandbox, and check each repository before using a skill in production.