If you need to sign a piece of code - eg. a Silverlight application, like I did with Sesame, an EXE, a DLL, an AIR application, a JAR applet - you need a code signing certificate.
A new version of Sesame has been uploaded. It contains several fixes and adjustments. The fixes concern mainly the filtering row.
This new version also introduces client-side paging, signed bits, and auto-updates.