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A vi-like editor based on Plan 9's structural regular expressions

  • text-editor
  • structural-regex
  • modal-editing
  • console-application

tiny recursive descent expression parser, compiler, and evaluation engine for math expressions

  • c
  • calculator
  • expression-evaluator
  • math

PCRE2 is a library implementing regular expression pattern matching with a C API

  • c
  • library
  • pattern-matching
  • pcre2

DebugView++, collects, views, filters your application logs, and highlights information that is important to you!

  • outputdebugstring
  • filter
  • logfile
  • regular-expression

ngrep is like GNU grep applied to the network layer. It's a PCAP-based tool that allows you to specify an extended regular or hexadecimal expression to match against data payloads of packets. It understands many kinds of protocols, including IPv4/6, TCP, UDP, ICMPv4/6, IGMP and Raw, across a wide variety of interface types, and understands BPF filter logic in the same fashion as more common packet sniffing tools, such as tcpdump and snoop.

  • sniffer
  • grepping