Omnigraffle is one of the best tools I've found for creating engineering diagrams. Whilst it is powerful, it is also quick and easy to use and you can copy and paste PDF's straight from Omnigraffle into either Keynote or Pages. This keeps the quality and opacity of the diagrams that have been created.

One of my favourite features of Omnigraffle is the ability to create your own templates. One of the most useful diagrams I work with is a standard borehole logging diagram. The patterns used in this diagram are from British Standard 5930 which means diagrams will be professional quality as well as quick to produce.

Download it here.

Tags: Boreholes, Geological sequences, Geology, iWork, Keynote, Logging, Omnigraffle, Pages, Template