Suggestions for shadow

The following packages have something in common with the package shadow. The packages are ordered in decreasing similarity.

Package decorule: Decorative swelled rule using font character
Package fancypar: Decoration of individual paragraphs
Package longfbox: Draw framed boxes with standard CSS attributes that can break over multiple pages
Package thmbox: Decorate theorem statements
Package background: Placement of background material on pages of a document
Package contour: Print a coloured contour around text
Package shadowtext: Produce text with a shadow behind it
Package shadethm: Theorem environments that are shaded
Package colorframed: Fix color problems with the package framed
Package boites: Boxes that may break across pages
Package framed: Breakable framed and shaded boxes
Package pst-vectorian: Printing ornaments
Package froufrou: Fancy section separators
Package sectionbreak: LaTeX support for section breaks
Package multicolrule: Decorative rules between columns
Package mdframed: Framed environments that can split at page boundaries
Package niceframe: Support for fancy frames
Package bidicontour: Bidi-aware coloured contour around text
Package bidishadowtext: Bidi-aware shadow text
Package attachfile2: Attach files into PDF
Package attachfile: Attach arbitrary files to a PDF document
Package pdfmarginpar: Generate marginpar-equivalent PDF annotations
Package repltext: Control how text gets copied from a PDF file
Package hypgotoe: Links to embedded files
Package pst-pdf: Make PDF versions of graphics by processing between runs
Package fancytabs: Fancy page border tabs
Package gradientframe: Simple gradient frames around objects
Package sectionbox: Create fancy boxed ((sub)sub)sections
Package notes: Mark sections of a document
Package caption2: Superseded version of the caption package
Package cuted: Mixing onecolumn and twocolumn modes