Suggestions for placeins

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

Package float: Improved interface for floating objects
Package dblfloatfix: Fixes for twocolumn floats
Package endfloat: Move floats to the end, leaving markers where they belong
Package fewerfloatpages: Reduce the number of unnecessary float pages
Package morefloats: Increase the number of simultaneous LaTeX floats
Package ctable: Flexible typesetting of table and figure floats using key/value directives
Package floatrow: Modifying the layout of floats
Package floatpag: Different pagestyles on float pages
Package hvfloat: Controlling captions, fullpage and doublepage floats
Package keyfloat: Provides a key/value interface for generating floats
Package nonfloat: Non-floating table and figure captions
Package nidanfloat: Bottom placement option for double float in two column mode (nidan-kumi)
Package nccfloats: Extensions of the LaTeX float mechanisms
Package caption: Customising captions in floating environments
Package newfloat: Define new floating environments
Package dpfloat: Support for double-page floats
Package rotfloat: Rotate floats
Package stfloats: Commands to control the presentation of floats
Package trivfloat: Quick float definitions in LaTeX
Package easyfig: Simplifying the use of common figures
Package here: Emulation of obsolete package for here floats
Package emptypage: Make empty pages really empty
Package hardwrap: Hard wrap text to a certain character length
Package nowidow: Avoid widows
Package vruler: Numbering text
Package midpage: Environment for vertical centring
Package rotpages: Typeset sets of pages upside-down and backwards
Package linegoal: A dimen that returns the space left on the line
Package hanging: Paragraphs with a hanging indent
Package placeins-plain: Insertions that keep their place
Package hep-float: Convenience package for float placement