5 Reliable Open-Source Windows Apps for Passwords, PDFs, File Search, Office and Media

That is a personal account, not a benchmark. Below is his list with what each project's own documentation says, including the caveats that a "boring and reliable" pitch tends to skip.

The Pitch: Boring Software Is a Feature​

Patel says these apps are among the first he looks for on a fresh machine. He doesn't claim they are the most powerful tools in their categories. His claim is that they are predictable and familiar across PCs, and that they don't create extra work.

That is a reasonable way to pick software. Reinstalling Windows is a good reminder of what you actually use. An app that earns a spot there has usually survived several rounds of "do I really need this?"

Two cautions apply. "Open source" does not by itself mean reliable or secure. And words like "fastest" or "always works" are Patel's opinions, not measurements. Here is what the projects' documentation supports.

KeePassXC: Your Passwords in a File You Control​

Patel likes that his password database isn't tied to a particular service or ecosystem. The project's documentation backs this up.

• The KeePassXC download page pitches it as password storage on a computer you trust, with no clouds and no third parties.
• KeePassXC's own FAQ says it keeps your passwords in an encrypted database file, unlike the original KeePass, which was tied to .NET. KeePassXC itself is written in C++ and runs natively on Windows, macOS and Linux.
• The project says the database is encrypted with AES-256 or Twofish. The master password is hardened with a configurable number of key transformations. A key file or a compatible hardware key can add protection.
• KeePassXC reads KDBX 3.1 and KDBX 4 natively, and can import older KeePass 1 .kdb files.

Windows details:

• The download page lists a version for Windows 10 and 11. It shows version 2.7.12 as current and notes that the MSVC Redistributable is required.
• 32-bit Windows is no longer supported after version 2.6.6.
• The project lists a Windows Package Manager install command: winget install -e --id KeePassXCTeam.KeePassXC. That is handy when setting up a new PC.
• If you see a "VCRUNTIME140_1.dll was not found" error at launch, the project says the Microsoft Visual C++ Redistributable is missing.

The trade-off: local control means you are responsible for the file. KeePassXC has no built-in cloud sync. The project suggests putting the database in a folder synced by a service such as OneDrive, Dropbox or Nextcloud. Losing the master password can lock you out permanently, so keep a backup. If you use a key file, the FAQ says to back that up too and to distribute it separately from the synced database.

SumatraPDF: A Reader That Handles More Than PDFs​

Patel values SumatraPDF for opening documents quickly, jumping between pages and searching text without hunting through menus. The project doesn't publish speed benchmarks in the material reviewed, so treat "quick" as his impression.

The format claim is easier to check. Patel says it supports other document types too. The project's documentation lists many:

• PDF, EPUB (unencrypted only), MOBI and some Kindle-family files
• FictionBook, plain text, Markdown, comic-book archives (CBZ, CBR and others), DjVu, CHM and XPS
• SVG and common image formats, including PNG, JPEG, GIF, TIFF, BMP and WebP

There are qualifications. PostScript and PJL files need Ghostscript installed. DVI files need a TeX toolchain, or dvips plus Ghostscript. DRM-protected eBooks won't open. SumatraPDF is a reader, so don't expect it to replace a full PDF editor.

LibreOffice: The Local Fallback​

Patel keeps LibreOffice for times when he wants a full office suite installed locally rather than depending on a browser-based tool. He also uses it for opening older files and making quick edits.

The Document Foundation's Getting Started Guide for LibreOffice 26.2 describes the suite as follows:

• Components: Writer (word processing), Calc (spreadsheets), Impress (presentations), Draw (vector graphics), Base (databases) and Math (formula editing).
• Platforms: Windows, Linux and macOS.
• Formats: the native format is OpenDocument. It can also open and save many other formats, including Microsoft Office ones. The guide says Excel workbooks can be opened and edited in Calc and saved back to Excel format.
• Help: Windows users can download offline Help for use without an internet connection.

Reality check: "Compatible with" does not mean "pixel-identical to." Complex layouts, macros and advanced features can behave differently from the same file in Microsoft Office. If a colleague or client expects a specific format, check the result before you send it. Patel doesn't claim LibreOffice replaces every Office workflow, only that it covers his own.

Everything: Filename Search That Skips the Folder Hunt​

Patel describes typing a few characters and finding a file almost immediately, even in folders that have collected years of clutter.

Voidtools' documentation explains the mechanism. When you run Everything for the first time, it automatically builds an index of all your local NTFS volumes. Indexing can take a few seconds, and after that you type part of a filename to find matching files and folders.

Other points from the documentation:

• It indexes internal NTFS drives by default. External drives and network folders can also be indexed.
• Sorting by Date Modified or Size surfaces recent or large files quickly.
• It remembers which results you open often, which speeds up repeat searches.
• Closing the window leaves Everything running in the background. To exit completely, use File > Exit. Or go to Tools > Options > UI and uncheck "Run in background."
• Some features, such as bookmarks, the folder sidebar and the index journal, require Everything 1.5.

What it is, and isn't: Everything is built around finding files by name. Don't treat it as a full-text search of file contents. "Fastest" is Patel's label, and no benchmark backs it.

VLC: The Fallback for Files Windows Won't Play​

Patel reaches for VLC when Windows doesn't handle a video file properly. He says he can adjust subtitles, audio tracks, playback speed and the picture without much setup.

VideoLAN's feature page supports the breadth of that claim.

• VLC plays files, discs, webcams, devices and streams. The page's own wording is "No spyware, No ads, No user tracking."
• It lists a wide range of video and audio codecs, container formats, subtitle formats and network streaming inputs.
• It describes hardware decoding on most platforms. It can fall back to software decoding when needed.

VideoLAN's heading says it plays "all formats," but the site's own descriptions elsewhere are less absolute. Treat it as a broadly compatible player, not a guarantee. A damaged file, an unusual codec setup or a hardware problem can still cause trouble.

What the Five Have in Common​

They share no technical design. What they share is a philosophy: each does one job without much friction. KeePassXC is the only one where a mistake carries real risk, which is why the backup advice matters most there.

A Practical Setup Checklist​

If you want to copy the "fresh install" routine, here is a sensible order:

1. Install KeePassXC first. Create a database, set a long master password, and decide where the file will live and how it will be backed up.
2. Add SumatraPDF and VLC to cover documents and media. Set them as default handlers only if you want to.
3. Run Everything once and let it finish indexing. If you also need external or network drives, add them in its index settings.
4. Install LibreOffice if you want a local office suite as a fallback. Test it on a few of your real documents before relying on it.
5. Check prerequisites. KeePassXC requires the Microsoft Visual C++ Redistributable.

Verdict​

This is a taste-driven list, not a ranking, and Patel is clear that it reflects his own routine. The documentation backs his descriptions of what each tool does. It also shows the limits: format conditions in SumatraPDF, imperfect Office fidelity in LibreOffice, filename-only search in Everything, "most" formats in VLC, and the backup duty KeePassXC puts on you. Software that does a modest job and stays out of the way tends to outlast the flashy stuff, and that is the best argument for this list.