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 a challenge: what are the absolute must-have apps? Over years of switching between operating systems, I have refined a core collection of tools that aren’t just great, they are essential to my day-to-day workflow.

These aren’t big, expensive programs; they are the six quality-of-life open-source apps that silently smooth out the rough edges without sacrificing my security or peace of mind.

Notesnook

A solid Evernote alternative

When I talk about quality-of-life apps, I’m talking about creating a knowledge management system. And for me, no app does this better than Notesnook. I use it as my external brain, and it’s one of the first things I download, whether I’m setting up a new MacBook or a Windows desktop.

I used to deal with other popular note apps – some were great on my Mac (like Craft) but terrible on Windows, and all of them made me uneasy about my data being stored on someone else’s servers.

Notesnook offers end-to-end encryption, solid organization via tags, notebooks, and nested folders, and the same sleek interface on every device.

It’s an open-source powerhouse that lets me focus entirely on what I need to write. It’s an essential upgrade to how I manage my digital life.

Bitwarden

LastPass, who?

Bitwarden is the solution I point to when someone tells me they are tired of the password mess. The core problem for anyone using a PC or a Mac, a phone, and a tablet is syncing and security.

Before Bitwarden, I was either writing my passwords down or using unreliable browser managers. Bitwarden became my quality-of-life app because it gave me control over my security, everywhere, for free.

The fact that the core application is open source is what makes me trust it with the keys to my entire digital life.

The list of features includes a solid password generator, multiple templates for password entries, unlimited passwords, devices, web extensions, and more. I don’t have to worry about storing my essential info ever.

Syncthing

Share files in no time

The biggest issue in my cross-platform life used to be moving files between my Mac and my Windows desktop. Cloud services were slow, often choked on large video files.

Syncthing is the beautiful, open-source solution that solved this for good. It gives me real-time, P2P sync with zero compromise on privacy. The moment I save a file in a synced folder on my Mac, it appears on my PC – often before I can even walk to the other room.

There is no involvement of a central server, as my computers talk directly to each other. The core open-source nature means I trust that all my transfers are encrypted, and I have total control over what is shared and with whom.

Super Productivity

A robust task and project manager

My biggest productivity challenge used to be context switching. I would jump between my to-do list, time tracker, break timer, and projects. I was just wasting mental energy on managing the work process. Here is where Super Productivity comes into play.

It’s jam-packed with features like Pomodoro technique, task time-boxing, project management, recurring reminders, and more. Since it’s fully open-source and focuses on being local-first, my data remains on my device.

Super Productivity integrates with your calendar, offers Kanban boards, focus mode, and a keyboard-first design to fly through your tasks.

Stirling PDF

Fly through PDF edits

Dealing with PDFs is a daily nightmare. For years, if I needed to merge two documents, extract one page, or compress a huge file for email, I was forced to use ad-filled, unknown PDF tools to get the job done. Stirling PDF is the tool that finally cut the cord.

You can use it as a simple web tool or even self-host on your preferred device. I can quickly merge my bank statements, split a massive corporate report, or convert a final Word document into a secure, password-protected PDF.

I can even use its OCR to make old scanned papers searchable. It’s the all-in-one PDF that eliminates the frustration, expense, and privacy risk of dealing with documents on both my Windows and Mac.

RustDesk

Unlock smooth remote sessions

RustDesk is another non-negotiable part of my work toolkit. While there is no shortage of remote tools out there, RustDesk remains my top choice for several reasons.

RustDesk is an open-source solution and packs a range of features anyone needs during remote sessions. I can use the chat window during remote sessions, copy and transfer files seamlessly, and even self-host the server.

Even if I just use their public servers, the core features – clipboard syncing, file transfer, and lag-free performance – are all there. It’s a cross-platform package that just works.

Beyond the basics

Ultimately, building your perfect workspace isn’t about the operating system you choose, but the tools you install on top of it. Whether you are a developer or a casual user, these open-source apps provide a reliable, secure, and free foundation for quality of life.

By switching to these transparent, community-driven projects, you can improve your daily workflow and also gain confidence in your software stack. So what are you waiting for? Pick one or two recommendations today and see how quickly they can change the way you commute.

Aside from these apps, you can even try these self-hosting apps to boost your productivity.