SearchBin is a fast commandline program for searching within binary files. It's a bit like grep for binaries. It offers wildcard matching and has three capabilities for searching: for bytes using hexidecimal, for a plain text string, and for a smaller binary file. Any discovered matches will print the found offsets (0-based).
The Aura.Input package contains tools to describe and filter user inputs from an HTML form, including sub-forms/sub-fieldsets, fieldset collections, an interface for injecting custom filter systems, and CSRF protection. Note that this package does not include output functionality, although the “hints” provided by the Form object can be used with any presentation system to generate an HTML form.