Suggestions for Shaded theorems

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

Package thmbox: Decorate theorem statements
Package autobreak: Simple line breaking of long formulae
Package thmtools: Extensions to theorem environments
Package newproof: Make commands to define proofs
Package ntheorem: Enhanced theorem environment
Package theorem: Manipulate theorem environments
Package theoremref: References with automatic theorem names
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 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 colorframed: Fix color problems with the package framed
Package shadow: Drop shadows for boxes
Package spalign: Typeset matrices and arrays with spaces and semicolons as delimiters
Package coloredtheorem: A colourful boxed theorem environment
Package keytheorems: An l3keys interface to amsthm
Package amsthm: Typesetting theorems (AMS style)
Package create-theorem: Initializing and configuring theorem-like environments, with multilingual support
Package phfthm: Goodies for theorems and proofs
Package inkpaper: A mathematical paper template
Package boites: Boxes that may break across pages
Package framed: Breakable framed and shaded boxes
Package abraces: Asymmetric over-/underbraces in maths
Package eqnarray: More generalised equation arrays with numbering
Package linkedthm: Hyperlinked theorem–proof environments for LaTeX
Package nccthm: Another theorem environment
Package statementsp: Theorem and proposition boxes with preview and recall functions
Package reptheorem: Repetition of theorem environments
Package resizegather: Automatically resize overly large equations