drawing sample from http://www.paperlessarchaeology.com
TouchDraw is a powerful, yet easy to use, illustration and drawing application for iPad. It has many of the features of desktop applications wrapped up in a mobile package. Best of all, it’s only a fraction of the price of a desktop application.
Built-in support for creating re-usable stencil libraries with the comment shapes and elements needed for your drawing.
Standard libaries for flow charting, network diagramming and others are bundled with the product.
Shapes and PathsBuilt-in support for common shapes and lines (lines, ellipses/circles, rectangles/squares, rounded rectangles, and perfect polygons).
For advanced shapes, there is support for a freeform pencil tool and full support for creation of bezier curves.Import and ExportCloud StorageComprehensive support for importing and exporting drawings to and from TouchDraw gives you the freedom to share your drawings with others.
Import Formats: SVG and Microsoft Visio (VDX)
Export Formats: JPEG, PNG, PDF, Microsoft Visio, SVG
LibrariesBuilt-in support for rules, grids and multiple units of measure (points, pixels, inches, feet, yards, millimeters, centimeters, meters, kilometers)
Support for snap to grid, snap to line and a „heads up” display to support precise editing.
Units and GridsBuilt-in support for DropBox means you can easily share and collaborate on drawings with your co-workers, friends and family.
Available in App Store for $8.99