Open source PDF creators are also available. PostScript - .ps Rich Text Format (RTF) — meta data format being developed by Microsoft since 1987 for Microsoft products and cross-platform document interchange[4][5][6][7][8][9] SYmbolic LinK (SYLK) Scalable Vector Graphics (SVG) - Graphics format primarily for vector-based images. TeX — Popular[citation needed] open-source typesetting program and format.