Washi tape is a Japanese paper tape which is available at most craft stores, stationery stores or online. The tape is writable, comes in a range of colours & patterns and not too sticky so is ideal for gift wrap purposes.
The gift I needed to wrap was large and quite personal so I wanted the wrapping to reflect this. I took some good old fashioned brown paper and cut lengths of washi tape, sticking the tape in a random pattern on the paper.
It's not the most fancy wrap but I think it's simple and colourful!