| Name | Official website | Programming language | Software license | Used by |
| Boost.Regex | | C++ | | Notepad++ >= 6.0.0, EmEditor |
| BoostXpressive | | C++ | | |
| DEELX | | C++ | | |
| FREJ | | Java | | |
| GLib/GRegex | | C | | |
| GNU regex | | C | | GNU libc, GNU programs |
| GRETA | | C++ | | |
| | RTL, HLS | | FPGA accelerated >100 Gbit/s regex engine for cybersecurity, financial, e-commerce industries. |
| Hyperscan | | C, x86-specific assembly | | Rspamd |
| ICU | | C, C++ | | Foundation |
| Irregexp | | C++ | | Chrome, Firefox, Node.js |
| Jakarta Regexp | | Java | | |
| java.util.regex | | Java | | jEdit |
| JRegex | | Java | | |
| MATLAB | | | | |
| Oniguruma | | C | | Atom, Take Command Console, Tera Term, TextMate, Sublime Text, SubEthaEdit, EmEditor, jq, Ruby |
| Java port of Oniguruma | | Java | | JRuby, Nashorn (JavaScript engine) |
| Pattwo | Stevesoft | Java | | |
| Perl Compatible [Regular Expressions|PCRE] | | C, C++ | | Apache HTTP Server, Nginx, BBEdit, Edbrowse, Julia, HHVM, Notepad++ < 6.0.0, PHP, Delphi, R, Exim, SWI-Prolog, Elixir, Erlang |
| Qt/QRegExp | | C++ | | Kate, Kile |
| regex - Henry Spencer's regular expression libraries | | C | | |
| RE2 | | C++ | | Go, Google Sheets, Gmail, G Suite |
| Henry Spencer's Advanced Regular Expressions | | C | | |
| RGX | | C++ based component library | | |
| RXP | | RTL | | hardware-accelerated search acceleration using RegEx available for ASIC, FPGA and cloud. Enables massively parallel content processing at ultra-high speeds. |
| SubReg | | C | | |
| TPerlRegEx | | Object Pascal | | |
| TRE | | C | | musl |
| TRegex | | Java | | GraalVM |
| TRegExpr | ,,
| Object Pascal | | Total Commander |
| Wolfram Language | | Wolfram Language | | Mathematica, the Wolfram Development Platform |
| XRegExp | | JavaScript | | |
| YARR | | C++ | | Safari, WebKit-based browsers, QML |