There are plenty of apps and tools that can help digitize your handwritten notes these days. Take the Livescribe Aegir Smartpen: it is a versatile gadget that not only turns your writings digital but also allows you to add voice to your notes. The Aegir smartpen can store up to 1200 pages of writing.
The companion app lets you search your handwritten notes and use custom tags to keep everything organized. Notes can be shared in various formats to the cloud. The Aegir smartpen can recognize up to 22 languages.