Leftovers
github.com/arpwal/leftovers- Category
- Developer Tools
- Rank
- No. 1802Tools index
Previous survey · No. 1792 ·
- Pricing
- Open Source
- Type
- TOOL
- Use case
- Coding
- Interfaces
- Desktop
- GitHub
- 10 stars
- Latest release
- v1.8.0
- Date
About
Leftovers is a free, open-source macOS menu-bar app that finds processes, dev servers, and MCP server instances that coding agents left running after a session ended, so they can be cleaned up. It ranks processes by their real memory footprint (RAM plus compressed plus swapped) rather than raw RAM, surfacing swapped-out leaks that Activity Monitor hides.
At a glance
Leftovers is a Mac menu bar app that groups processes left running by apps and coding agents. It is worth a look if your Mac slows down after several sessions and you want to see which process trees still hold memory.
Good fit
Mac developers looking for a familiar dev server or helper that remains after its task.
Consider something else when
Use the normal app shutdown or your administrator’s process tools for services you cannot identify.
Start here
Start a harmless local dev server, identify its process in the app and confirm its command and owner. Stop it through its normal terminal first and see how the display updates.
Cost and requirements
Free, open-source Mac app. The package declares macOS 14 or newer.
Limits to know
A high memory footprint is evidence to investigate. It does not establish that a process is safe to terminate or that it caused the slowdown.
Sources checked 2026-11-05. Source-based assessment.
Why it made the leaderboard
Surfaces the memory footprint of dev servers and MCP processes that coding-agent sessions leave running in the background, which Activity Monitor hides since it only sorts by RAM, not swap.
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Editorially curated, with community endorsements as a secondary signal. Corrections welcome.