Setting up a new computer, whether it’s a shiny Mac or a powerful PC, always feels like a fresh start. But it also comes with one challenge: what are the absolute must-have apps? After years of moving between operating systems, I’ve built a core collection of tools that aren’t just helpful — they’re essential.
These aren’t heavy, expensive programs. They’re six open-source quality-of-life apps that quietly improve daily computing without compromising privacy, security, or peace of mind.
Notesnook
A Solid Evernote Alternative
When I talk about quality-of-life apps, I mean a tool that helps build a proper knowledge management system — and Notesnook does this better than anything else I’ve tried. It has become my external brain and one of the very first apps I install on both Mac and Windows.
I’ve used countless note-taking apps. Some worked great on macOS (like Craft) but were terrible on Windows. Others stored all my data on someone else’s servers. Notesnook solves all of that.
It offers end-to-end encryption, excellent organization using tags, notebooks, and nested folders, and provides the same sleek interface everywhere. Because it’s open source, I trust it completely. It’s a true upgrade for managing your digital life.
See at Official Website
Bitwarden
LastPass, Who?
Bitwarden is always my recommended solution when someone is overwhelmed by password chaos. If you use multiple devices — PC, Mac, phone, tablet — the biggest concerns are syncing and security.
Before Bitwarden, I relied on notebooks and unreliable browser password managers. Bitwarden changed everything because it gives me complete control over my passwords across all devices, free of charge.
Since the core application is open source, I trust it with my entire digital life. It includes unlimited passwords and devices, strong password generation, multiple entry templates, secure notes, browser extensions, and more.
Its free plan is more than enough for most people.
Syncthing
Share Files in No Time
Moving files between my Mac and Windows PC used to be a painful task. Cloud services were slow, especially with large video files. Syncthing solved the problem permanently.
Syncthing gives me real-time, peer-to-peer syncing with zero privacy compromises. When I save a file on my Mac, it appears on my PC almost instantly — often faster than I can walk to the other room.
There’s no central server. My devices talk directly to each other. Because Syncthing is open source, all transfers are encrypted and fully under my control.
See at Syncthing
Super Productivity
A Robust Task and Project Manager
My biggest productivity challenge used to be context switching. I bounced between a to-do app, a time tracker, a Pomodoro timer, and a project board. Managing the workflow became work in itself.
Super Productivity combines all of these into one smooth experience. It includes Pomodoro timers, time-boxing, project management tools, recurring tasks, calendar integration, Kanban boards, focus modes, and a keyboard-first interface that feels extremely efficient.
Since it’s open source and local-first, all data stays on my device.
See at Super Productivity
Stirling PDF
Fly Through PDF Edits
Working with PDFs is something everyone dreads. Whether it’s merging documents, extracting pages, compressing files, or converting formats, most tools are slow, ad-filled, or risky.
Stirling PDF is the tool that fixed all of that for me.
It can be used both as a web tool and a self-hosted solution. I can merge bank statements, compress large reports, convert Word documents into protected PDFs, or run OCR on old scanned documents. It’s fast, private, and incredibly flexible.
See at Stirling
RustDesk
Unlock Smooth Remote Sessions
RustDesk is a non-negotiable tool for remote access in my workflow. There are plenty of remote tools out there, but RustDesk remains my top choice for several reasons.
It’s open source, smooth, and packed with features. I can chat during sessions, transfer files, sync clipboards, and even self-host the entire server. Even when using the public servers, performance remains reliable and secure.
It’s a cross-platform remote desktop solution that simply works.
Beyond the Basics
Creating the perfect workspace isn’t about the operating system you use — it’s about the tools you install. Whether you’re a casual user or a developer, these open-source apps offer a reliable, private, and free foundation for everyday computing.
By choosing transparent, community-driven software, you strengthen your workflow and gain more confidence in your tools. Try a couple today and see how quickly they improve your daily routine.
