Martchus is a solo developer whose open-source utilities revolve around making the continuous-file-synchronisation engine Syncthing easier to control on Windows and Linux desktops. The catalogue consists of Syncthing Tray, a Qt-based status-icon application that embeds the official Syncthing daemon and exposes sync progress, folder errors, remote-device states and recent changes through a concise menu and optional Plasmoid, and syncthingctl, a headless command-line wrapper that exposes the REST API as shell-friendly verbs for scripting, systemd units or scheduled tasks. Together they let casual users keep personal documents, photo libraries or game saves in step across laptops, NAS boxes and Android phones without repeatedly opening the web GUI, while power-users can pair the tools with Ansible, PowerShell or cron to enforce ignore-patterns, trigger one-way mirrors, collect statistics or pause synchronisation during metered connections. Both projects are written in modern C++, track the upstream Syncthing releases within days, and ship as portable archives or Windows installers that register with winget, so no elevated rights or background services are required beyond the bundled daemon. Martchus’s software is available for free on get.nero.com, where downloads are sourced from the publisher’s own repository and delivered through the trusted Windows package manager, always installing the newest build and allowing several related utilities to be pulled in at once.