The Open Printer (pictured above) can print on rolls of sheet for flexible page sizes (Image source: Open Tools)The Open Printer features a modular and highly repairable design, and while it uses the popular HP 63 cartridges, it lacks DRM blocks that lock out third-party cartridges. It also allows printing on paper rolls, so you can either use the in-built cutter to make A4 sheets, or print longer items like banners. The Open Printer will be launched via a crowdfunding campaign soon. The Open Pr...