JDraftPDF is a tablet based PDF annotator and editor. The software allows annotations to be made directly to a PDF file using a tablet and pen. The main application is for annotating document drafts without the need for printing.
aSVERD is a little system for generating Entity Relationship Diagrams (ERD) as Scalable Vector Graphics (SVG). SVG can be viewed and zoomed in a Web Browser. The diagrams can be edited with an SVG editor and round-trip updated against the database.