IngeCAD
Free 2D drafting in the style of classic AutoCAD, with round-trip DWG and DXF. The views on your sheets come out as DXF, ready to open there.
Draw as if by hand. Tag BIM. Export IFC and PDF drawings.
Native on Linux — also Windows and macOS. Open source.
Draw lines, rectangles, circles and arcs; push a face and you have a solid. No layers of CAD complexity between your idea and the model.
3.50 and the line is 3.50 m long
BIM in IngeTrazo isn't a cage of rigid families: you model freely and tag whatever you want as a wall, slab, column or door.
Solids guaranteed watertight: if an operation would break the volume, the engine rejects it instead of corrupting your takeoff.
Place your project in the real world: satellite imagery, 3D relief and field data, right inside the modeler.
The whole modeler works offline; only the map uses the internet.
Compose sheets as in QGIS or LayOut: views of the model at exact scale on the sheet, dimensions that re-measure themselves, and vector PDF ready for the project file.
In the screenshot: the sheet composer open on sheet D02, the detail of a bench with a pergola for the Yanque plaza — front view, side view with a section cut, plan and 3D, all at 1:20, with dimensions, material callouts, a scale figure and title block; on the right, the properties of the selected view: scene, scale, Architectural style and annotation size.
Describe what you want —or attach a photo— and the AI writes the recipe: revolves, extrusions, Python over IngeTrazo's action API. The deterministic engine runs it: every step is one undo, every recipe goes through the watertightness guard, and the model is still yours, editable by hand.
Top: the MCP bridge on an uncropped Ubuntu desktop. Claude Code in the terminal has just drawn, in the app open next to it, a 1.40 × 0.80 × 0.75 m dining table with four chairs (0.45 × 0.45 seat at 0.45 m, backrest at 0.90 m) —“a table with 4 chairs, standard measurements”— and answers with the table of dimensions it used; on the right, the bridge dialog with the connection line. How it's done: Extensions ▸ AI Bridge (MCP), copy the line it shows you, paste it into the terminal (claude mcp add ingetrazo -- …) or into Claude Desktop's configuration, and ask for whatever you want with IngeTrazo open.
Bottom: the AI Assistant, its dialog open over the solar light pole from the examples (also designed through the bridge). How it's done: Extensions ▸ AI Assistant (Ctrl+Shift+A), paste your provider's key, type the request with its measurements —or attach a photo— and Send; every step undoes with Ctrl+Z. Other modelers sell this as a subscription; here it's free and you use whichever key you choose. Step-by-step guide in the manual (Spanish) →
A model makes sense once it has people next to it, a tree and a car. IngeTrazo brings 1,510 components one click away and 427 textures — and each one arrives at its real size, not whatever size it happens to get.
In the screenshot: a SketchUp model opened with its textures and two figures placed, with the components tray on the right. All the content comes from the free Sweet Home 3D library (CC0, CC BY and Free Art License); IngeTrazo always shows the license and author of each piece.
Your years-long library doesn't get left behind — and neither do your colleagues: IngeTrazo opens .skp directly and saves to .skp whatever you model, thanks to OpenSKP, the free reader/writer for the SketchUp format — no converters, no extra installs.
In the screenshot: a real park opened from its .skp — play equipment, stands and roofing, with its original layers. IngeTrazo contributes code to OpenSKP: every file it opens here improves the free reader for everyone.
IngeTrazo isn't alone. From the same author and under the same license, two more programs cover drafting and construction cost estimating. All three talk to each other.
Free 2D drafting in the style of classic AutoCAD, with round-trip DWG and DXF. The views on your sheets come out as DXF, ready to open there.
Import your model's IFC and build the estimate with unit cost analysis, a Gantt schedule with round-trip to MS Project, and a price-adjustment formula with Peru's INEI indices.
All under GPL-3.0-or-later, with no paid editions. The code for all three lives at github.com/ingelibre.
IngeTrazo is free software under the GPL-3.0. No accounts, no mandatory cloud, no subscriptions: your models live on your computer, in an open format you'll always be able to read. Made in Peru for engineers, architects and designers across Latin America and beyond.
Free and complete. Version 0.3.7.1 — August 2026.
If SmartScreen warns you: “More info → Run anyway” (the installer isn't digitally signed).
Install it from our repository and flatpak update will bring you every new version. It lands in your applications menu, with .igz and .skp files associated.
flatpak remote-add --user --if-not-exists ingetrazo https://ingetrazo.com/ingetrazo.flatpakrepo
flatpak install --user ingetrazo com.ingetrazo.IngeTrazo
flatpak run com.ingetrazo.IngeTrazo
Prefer the standalone file? The card above downloads it and it installs with a double-click, but that way it doesn't update itself.
Installs nothing: make it executable and open it (or double-click it in your file manager).
chmod +x IngeTrazo-0.3.7.1-x86_64.AppImage
./IngeTrazo-0.3.7.1-x86_64.AppImage
It needs FUSE, which almost every distro ships. If yours doesn't, use the tar.gz.
For distros without FUSE, or to install it under /opt: extract and run.
tar -xzf IngeTrazo-0.3.7.1-linux-x86_64.tar.gz
IngeTrazo-0.3.7.1/ingetrazo
It carries the same as the AppImage: Python, Qt and the .skp reader travel inside.
All three run on Ubuntu 22.04 or later. If something fails, --check tells you what's missing.
You can also run it from source (3 commands, see the README). All files are in the GitHub releases.
Open the .dmg and drag IngeTrazo to Applications. It isn't signed with an Apple account yet, so the first time macOS won't open it with a double-click: right-click ▸ Open and confirm. From then on it opens normally, and .igz and .skp files open with a double-click. Packaged by Félix Riestra.
For Macs with Apple Silicon (M1 and later). What doesn't work on Mac yet: DWG import and the skp2dae helper converter; opening and saving .skp does. If something fails, tell us in a GitHub issue.
Four real documents from the remodeling of the Yanque plaza, Chichas district (Arequipa, Peru, 2026): the model with its scenes and its A3 sheet exactly as it comes out of IngeTrazo, with the PDF alongside. Download them and open them with File ▸ Open.
Octagonal pedestal, fluted shaft and two basins with wavy rims: 22 component instances, shadows from the real sun and a section plane. The sheet has front view, 3D, plan and section at 1:40.
A concrete bench with a timber pergola, built from components and with five saved scenes. The sheet: four views, 23 dimensions and 12 leader labels.
A 4.5 m pole with two floodlights and its panel, a truncated-cone pedestal, a buried footing and the 3/8" rebar drawn inside — modeled with recipes by the AI Assistant. The sheet includes the pedestal detail.
Following structural sheet E02: concrete and all the reinforcing steel (footings, columns, segmental arch, beam and tympanum), ashlar capitals, four ornamental lamps, lettering and sculpture; look at it in X-Ray. Sheet D04: front, side, plan and 3D at 1:50, the lettering and sculpture detail at 1:25 and the capital detail at 1:20, with levels, ground line and leader labels.
All together in every release: IngeTrazo-ejemplos.zip · or in the examples/ folder of the repository. Documents by Ing. Marco Sumari under CC BY 4.0; they require IngeTrazo 0.3.15 or later.
What everyone asks before drawing their first line.
Yes. IngeTrazo is free software under the GPL-3.0: free today and forever, with its source code published on GitHub. No accounts, no subscriptions, no locked features.
Drawing feels just as direct (push/pull, inferences, exact measurements typed on the keyboard), but IngeTrazo is free, runs natively on Linux, guarantees watertight solids fit for quantity takeoff, and adds the BIM layer: tag the geometry and get quantities and IFC.
Yes to both, .skp directly with no converters: File ▸ Import ▸ SketchUp to open, and File ▸ Export ▸ SketchUp to save. Built on OpenSKP, the free reader/writer for the format that IngeTrazo contributes to — it reads files from every version (geometry, groups, components, materials, textures, layers, scenes, dimensions and leader texts), and what you export opens in SketchUp with its annotations included. It also imports COLLADA (.dae) and OBJ.
BIM means giving the model meaning: this solid IS a wall, this face IS a door. With that, IngeTrazo calculates construction quantities (m², m³, units) and exports them to IFC, the standard format that cost-estimating software understands — including IngePresupuestos.
Yes. The sheet composer places views of the model at exact scale (1:50, 1:100…) on A4–A0 sheets, with dimensions anchored to the model that update when the model changes, an editable title block, graphic scale, numbered view titles, section marks, level and chained dimensions, detail callouts, and a vector hidden-line style with pens and poché. Export each sheet — or the whole set — to vector PDF, and the view to DXF.
Yes. Since version 0.3.2 IngeTrazo has an Extensions menu: copy a plugin (a Python file) into your personal folder and its tools show up in the menu — much like SketchUp extensions. Two come built in: Model Info (statistics, materials with painted m², and BIM objects) and a Python Console to inspect and automate the model with code, all tied into undo. The guide is in the manual (Spanish).
Yes, in two ways. The built-in AI Assistant is a chat: paste the key of whichever provider you prefer (Groq has a free tier; also Gemini, OpenAI, Anthropic, OpenRouter, DeepSeek, or Ollama on your own machine) and describe the model in words or with a photo. And the MCP bridge lets Claude Desktop or Claude Code draw directly in the open app. In both cases the AI generates recipes that the engine executes —never blind meshes—, every step can be undone and the model stays editable by hand. Without AI, IngeTrazo works just the same, and offline.
Yes, the whole modeler works offline and your files live on your computer. Only the satellite map and the 3D terrain download imagery from the internet while you use them.
On Windows: download the installer from the Download section, double-click and you're done (it associates .igz files). On Linux: download the Flatpak (double-click and GNOME Software / KDE Discover installs it, with .igz and .skp files associated), the AppImage (make it executable and open it) or, if your distro lacks FUSE, the tar.gz: extract it anywhere and run ingetrazo. If something doesn't work, --check tells you what's missing. On macOS (Apple Silicon): download the .dmg from Download ▸ macOS, drag IngeTrazo to Applications and the first time open it with right-click ▸ Open (it isn't signed with an Apple account yet). You can also run it from source with 3 commands.
Not its strong suit yet, but it's on the horizon. Today you can export to binary STL and take it to your slicer, and the solids the engine makes are closed; what it doesn't have yet are dedicated 3D-printing tools (wall-thickness checks, overhangs, mesh repair, 3MF). They're planned for the future.