Visio替代軟體 - Dia，一般應用於非正式的臨時製圖，很適合於教學用途，支援了實體關係圖、UML靜態結構流程圖、網路架構圖、一般流程圖、ER-Model圖...等等，可以將圖形載入或儲存為自訂的XML檔，匯出EPS、SVG、XFIG、WMF、PNG檔。（阿榮）
下載連結→ https://www.azofreeware.com/p/dia.html
官方網站：Dia
軟體性質：自由軟體（免費）
介面語言：繁體中文（含多國語系）
系統需求：Windows、GTK+ Runtime Environment 2.10 以上版本
關鍵字：DiaPortable
阿榮評語：
這套軟體還不支援中文檔案路徑，所以若檔案無法開啟時，要放在根目錄再去開啟！
[2008.06.28] 0.96.1-8 開始內建中文。
Dia is a gtk+ based diagram creation program released under the GPL license.
Dia is inspired by the commercial Windows program 'Visio', though more geared towards informal diagrams for casual use. It can be used to draw many different kinds of diagrams. It currently has special objects to help draw entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and many other diagrams. It is also possible to add support for new shapes by writing simple XML files, using a subset of SVG to draw the shape.
It can load and save diagrams to a custom XML format (gzipped by default, to save space), can export diagrams to a number of formats, including EPS, SVG, XFIG, WMF and PNG, and can print diagrams (including ones that span multiple pages).