ICU github.com

Python: re github.com

Perl github.com

Java: java.util.regex github.com

RE github.com

RE github.com

Syntax github.com

.NET: System.Text.RegularExpressions github.com

arkregex github.com

fancy-regex playground fancy-regex.github.io

CyrilEx extendsclass.com

Comparison of regular expression engines en.wikipedia.org

Regular expressions library en.cppreference.com

Regexp docs.ruby-lang.org

regex docs.rs

re docs.python.org

Pattern docs.oracle.com

RegExp developer.mozilla.org

Regex developer.apple.com

Regular Expression Improvements in .NET 7 devblogs.microsoft.com

Regular Expressions dev.mysql.com

Debuggex debuggex.com

Manual boost.org

Boost.Regex: Performance boost.org

Regex Legends: The People Behind the Magic blog.stevenlevithan.com

Performance of Greedy vs. Lazy Regex Quantifiers blog.stevenlevithan.com

ripgrep is faster than {grep, …} blog.burntsushi.net

Introducing Regular Expressions amazon.com

Regular Expressions Cookbook, 2nd Edition amazon.com

Book: High Performance JavaScript amazon.com

Mastering Regular Expressions, 3rd Edition amazon.com

Book: Regular Expressions Cookbook, 2nd Edition amazon.com

Book: Mastering Regular Expressions, 3rd Edition amazon.com

Aba Search and Replace abareplace.com

explainer 2ality.com

Webwigo webwigo.net

Website for virtual playing of Wherigo geocaches.

The A-Team Caching - Souvenirs thea-team.net

Website with information on all souvenirs.

TBScan tbscan.com

An app to discover trackables just by pointing your camera at the code.

SolvedJigidi solvedjigidi.com

The database of solved Jigidi geocaches.

Shop Geocaching shop.geocaching.com

Official geocaching shop where you can buy cache containers, trackables, wearables and more.

pycaching pypi.org

Python 3 interface for working with Geocaching.com website.

Project-GC project-gc.com

Website that gives a lot of statistics about your geocaching account.

WhereYouGo play.google.com

[Android] Open source, unofficial app for playing Whereigo geocaches.

c:geo play.google.com

[Android] The most popular free unofficial app for geocaching. Has many tools the official app doesn't have.

My Geocaching Profile mygeocachingprofile.com

Website to build a detailed profile of your geocaching accomplishments.

LonelyCache lonelycache.com

Website with the list of geocaches that were not found in many years.

Log Them All! logthemall.org

Website to log several trackables at once by simply entering their codes in a single list.

CacheStats logicweave.com

[Windows] Application that displays your geocaching statistics.

GSAK (Geocaching Swiss Army Knife) gsak.net

[Windows] Desktop app for managing geocaches and waypoints.

GC little helper II github.com

Powerful tool to enhance and extend the functionality of the geocaching website.