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Castor

Spotlight that executes tasks instead of just finding them

Productivity
Open Source
GitHub
Visit WebsiteSee on Product HuntGithub

Hunted byBiagioBiagio

Castor is a free, open source AI agent for macOS. Hit a hotkey, tell it what to do — it already knows your Finder paths, browser tabs, clipboard and screen before you ask. Powered by Gemini Flash, built natively for macOS 26 Tahoe.

Top comment

Hey PH! 👋 I built Castor because I kept switching between Spotlight, the terminal, and AI chatbots to get simple things done. The idea was: what if one overlay just knew your context and acted on it? It's a personal project, rough around the edges, but I use it daily. Free and open source — would love feedback from this community on where to take it next. GitHub: https://github.com/biagio-incard...

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Wondering how it looks like? here it is :)

About Castor on Product Hunt

Spotlight that executes tasks instead of just finding them

Castor was submitted on Product Hunt and earned 0 upvotes and 2 comments, placing #160 on the daily leaderboard. Castor is a free, open source AI agent for macOS. Hit a hotkey, tell it what to do — it already knows your Finder paths, browser tabs, clipboard and screen before you ask. Powered by Gemini Flash, built natively for macOS 26 Tahoe.

Castor was featured in Productivity (650.7k followers), Open Source (68.4k followers) and GitHub (41.2k followers) on Product Hunt. Together, these topics include over 160.9k products, making this a competitive space to launch in.

Who hunted Castor?

Castor was hunted by Biagio. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.

Want to see how Castor stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.