Suggestions for contour

The following packages have something in common with the package contour. 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 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 shadow: Drop shadows for boxes
Package bidicontour: Bidi-aware coloured contour around text
Package clrstrip: Place contents into a full width colour strip
Package pdfcolfoot: Separate color stack for footnotes with pdfTeX
Package pdfcolparcolumns: Fix colour problems in package parcolumns
Package pdfcolparallel: Fix colour problems in package parallel
Package boites: Boxes that may break across pages
Package framed: Breakable framed and shaded boxes
Package hycolor: Implements colour for packages hyperref and bookmark
Package normalcolor: Changing \normalcolor
Package pagecolor: Interrogate page color
Package pdfcol: Macros for maintaining colour stacks under pdfTeX
Package xcolor: Driver-independent color extensions for LaTeX and pdfLaTeX
Package pst-vectorian: Printing ornaments
Package froufrou: Fancy section separators
Package sectionbreak: LaTeX support for section breaks
Package pst-grad: Filling with colour gradients, using PSTricks
Package pdfcolmk: Improved colour support under pdfTeX (legacy stub)
Package luacolor: Color support based on LuaTeX’s node attributes
Package colortbl: Add colour to LaTeX tables
Package color: Colour control for LaTeX documents
Package coloredtheorem: A colourful boxed theorem environment
Package multicolrule: Decorative rules between columns