LibreCAD 2.1.3

LibreCAD 是一款功能完整、開放原始碼的 2D CAD 應用程式。它支援超過 20 種語言，並且跨平台相容於所有主要作業系統，包括 Microsoft Windows、Mac OS X 以及 Linux（Debian、Ubuntu、Fedora、Mandriva、Suse 等）。

LibreCAD 的介面乍看之下可能有點雜亂，但如果你查看應用程式內附的完整說明文件，很快就會上手。介面基本上有一個選單列，上面有大量按鈕，方便你輕鬆加入各種元素。此外還有數個面板，可以讓你檢視進行中的專案。

LibreCAD 支援多種匯入格式，包括 DXF、LFF、CXF、JWW、BMP、GIF、ICO、JPG、PNG、PPM、SVG、TIFF、WBMP、XBM 和 TGA，同時也可以匯出為 DXF、LFF、CXF、DDS、ICNS、PBM、PNG、ICO、BMP、SVG、TIFF、ICO 和 PDF 等格式。

LibreCAD 提供豐富的編輯與繪圖選項，包括加入線條、點、圓形、橢圓、曲線、聚合線和文字方塊。你也可以輕鬆縮放，並移動、複製、對齊、旋轉、鏡射、縮放和修剪元素。此外，還能延長、倒角、分割、拉伸、刪除，以及將文字分解為字母。所以，如果你需要的不只是基本的 2D CAD 應用程式，LibreCAD 會是個好選擇；它設計良好、資源占用少，而且免費且開放原始碼。

LibreCAD is a fully comprehensive, open source, 2D CAD application. It is available in more than 20 languages and is also cross platform for all major operating systems, including Microsoft Windows, Mac OS X and Linux (Debian, Ubuntu, Fedora, Mandriva, Suse, etc).

LibreCAD's interface may seem a bit cluttered at first glance, but you will get used to it quickly if you view the very comprehensive Help documentation that is bundled with the application. The interface basically has a menu bar with a large number of buttons to enable you to add elements easily. There is also a number of panes that you can view your on-going project from.

LibreCAD supports numerous formats for importing, including DXF, LFF, CXF, JWW, BMP, GIF, ICO, JPG, PNG, PPM, SVG, TIFF, WBMP, XBM and TGA, whilst exporting is possible using DXF, LFF, CXF, DDS, ICNS, PBM, PNG, ICO, BMP, SVG, TIFF, ICO and PDF extensions.

LibreCAD has plenty of editing and drawing options, including the ability to add lines, points, circles, ellipses, splines, polylines and text boxes. You can also zoom in and out with ease and move, copy, align, rotate, mirror, scale and trim elements. As well as lengthen, bevel, divide, stretch, delete and explode text into lettering. So, if you need more than a basic 2D CAD application, then LibreCAD is a good choice; it is well designed, consumes little resources and is free and open source.