Suggestions for loops

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

Package etextools: ε-TeX tools for LaTeX users and package writers
Package macrolist: List operations for LaTeX2ε
Package mdwlist: Miscellaneous list-related commands
Package csvmerge: Merge TeX code with csv data
Package invoice-class: Produces a standard US invoice from a CSV file
Package tokenizer: A tokenizer
Package asciilist: Environments AsciiList and AsciiDocList for prototyping nested lists in LaTeX
Package bubblesort: Bubble sorts a list
Package mdwtools: Miscellaneous tools by Mark Wooding
Package csvtools: Reading data from CSV files
Package csvsimple: Simple CSV file processing
Package listparskip: Adjust vertical space around lists
Package context-handlecsv: Data merging for automatic document creation
Package enumsub: Aligned inline sublists for enumitem
Package revnum: Reverse enumerate
Package outline: List environment for making outlines
Package desclist: Extended description lists
Package shortlst: Compact lists by running several items per line
Package scaletextbullet: Resize the \textbullet without changing its vertical center
Package commalists-tools: Manipulate numeral comma separated lists
Package lua-regression: Add polynomial regressions to graphs
Package gatherenum: A crossover of align* and enumerate
Package labels4easylist: Add reference labels to easylist items
Package sitem: Save the optional argument of \item
Package iitem: Multiple level of lists in one list-like environment
Package lazylist: Lists in TeX’s mouth
Package enumext: Enumerate exercise sheets
Package multenum: Multi-column enumerated lists
Package etaremune: Reverse-counting enumerate environment
Package eqlist: Description lists with equal indentation
Package engrec: Enumerate with lower- or uppercase Greek letters