The best replacement for flowchart is pseudocode.

The best alternatives to flowchart are rated as following:
★★★★★  pseudocode
★★  algorithm
★★  process map
★★  dfd
★★  activity diagram
★★  flow chart
★★  decision tree
★  use case
★  uml
★  bpmn
★  data flow diagram
★  program flowchart
★  state machine
★  system flowchart
★  state diagram
★  flow diagram
★  diagram
★  dataflow diagram
★  workflow
  mind map
  hierarchy chart
  pseudo code
  write structured pseudocode
  block diagram
  sitemap
  structure chart
  sequential workflow

Your alternative for flowchart is not listed? Suggest!
Speaking about flowchart, one probably shouldn't forget about pseudocode.

Other search terms related to flowchart and their ratings are:
★★★★★ pseudocode
★★★ algorithm
★ algorithm and pseudocode
You have in mind a companion for flowchart and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of flowchart in all years. Click on graph for more.
flowchart
pseudocode
algorithm