Take one finished project and try to rebuild its final deliverables using only the archived source files and your proposed toolkit. Missing fonts, linked images, undocumented conversion settings, and “final-final-revised” files will surface immediately. That is a better qualification test than asking whether each program can open a sample file.
The free tool that impresses me most for team work is diagrams.net Desktop. It covers flowcharts, process maps, network diagrams, basic floor plans, and rough interface layouts without requiring an account. The editable diagram can stay beside the project files, while PDF, SVG, or PNG exports give everyone else something easy to view. It is much less troublesome than passing screenshots of diagrams around and then discovering nobody has the source. The limitation is collaboration. Two people should not edit the same local diagram simultaneously and expect a clean merge.
Pandoc deserves a look for routine conversion. Its command line interface puts people off, but that can be an advantage when standardizing a workflow. Give the team a few scripts such as “make client DOCX” or “build HTML package,” and the conversion process becomes repeatable instead of depending on which export boxes someone remembered to select. Word formatting may need a reference document, and PDF generation can require extra setup, so I would not present it as a universal drag-and-drop converter. It is excellent when you have a small number of known document paths that occur repeatedly.
For quick transfers between machines, LocalSend is another unusually clean utility. It moves files over the local network without cloud storage or user accounts, which is useful for large media files or temporary handoffs. It should not become an informal file repository, though. If the only copy of a deliverable lives in someone’s Downloads folder after a transfer, the software worked correctly and the process still failed.
I would push back slightly on the assumption that a small team necessarily needs dedicated project-tracking software. If your work has straightforward assignments and deadlines, a carefully designed spreadsheet may be easier to preserve and audit than a free hosted board. Give each task a stable identifier, owner, status, due date, and link to its project folder. That sounds primitive, but it avoids maintaining a second system whose notifications everyone eventually ignores. Move to a tracker when you need dependencies, recurring work, permissions, or a searchable discussion history, not because Kanban columns look more professional.
The category I would include in the standard toolkit is recovery. FreeFileSync has a polished interface for folder comparison and repeatable copy jobs, but synchronization by itself is not backup. A mistaken deletion can be copied just as efficiently as a correct edit. Configure versioning or pair it with storage that retains previous versions, then test restoring an older file. “The backup job completed” is not the same result as “we can recover Tuesday’s document.”
My shortlist would therefore be based on workflows rather than departments: diagrams.net for editable diagrams, Pandoc scripts for repeatable document output, LocalSend for temporary machine-to-machine transfers, and FreeFileSync for controlled copies with recovery enabled. Let people keep specialized editors when needed. Standardize the points where work changes hands, because that is where inconsistent software choices become a team problem.