function: date-time

219 products, primary matches first, then adoption-weighted; health v2 shown.

Product	Health v2	Stars	Maturity
schedule-x/schedule-x Schedule-X is a modern JavaScript event calendar library for web apps, offering responsive views, internationalization, and an extensible p…	73	2539	active
liriliri/licia Licia is a zero-dependency JavaScript utility library containing over 400 micro modules for everyday tasks like DOM manipulation, cookies, …	98	2382	active
gookit/goutil goutil is a Go utility library providing 900+ helper functions across packages for strings, arrays, maps, structs, reflection, errors, time…	91	2360	active
learnhouse/learnhouse LearnHouse is a next-generation open-source learning management system (LMS) for creating, sharing, and selling educational content. It com…	99	2203	active
baiy/Ctool Ctool is a multi-platform Swiss-army toolbox of common developer utilities including hashing, encryption/decryption, encoding, JSON/YAML/XM…	37	2050	active
rememberber/MooTool MooTool is an all-in-one desktop developer toolbox offering dozens of handy utilities in a single GUI app, including JSON formatting, times…	99	2032	active
kvesteri/sqlalchemy-utils A Python library providing various utility functions, custom data types, and helpers for SQLAlchemy. It extends the ORM with extra column t…	74	1342	active
copperspice/copperspice CopperSpice is a set of cross-platform C++ libraries (Core, Gui, Network, Multimedia, SQL, OpenGL, Vulkan, WebKit, XML, and more) derived f…	74	1324	active
soulverteam/SoulverCore SoulverCore is a Swift framework providing a natural language math engine that evaluates expressions like '65 kg in pounds' or '$25k over 1…	95	1047	active
yuzhengyang/Fork Fork is a C# utility library (published as Azylee.Core on NuGet) that bundles common helper methods for data processing, file handling, enc…	43	1007	active
AbrahamCaiJin/CommonUtilLibrary A collection of general-purpose Java utility classes for rapid Android development, covering areas like bank card validation, SharedPrefere…	49	2830	maintenance
helpers/handlebars-helpers A library of 188 Handlebars template helpers organized into ~20 categories such as array, string, math, date, and markdown. It works with a…	32	2270	maintenance
l123456789jy/Lazy A curated collection of commonly used Android utility classes (LazyLibrary) written in Java, covering areas like animations, dates, bitmaps…	45	2167	maintenance
Sky24n/flustars A Flutter common utility library providing helper classes like SpUtil (SharedPreferences wrapper), ScreenUtil (screen adaptation), WidgetUt…	32	1917	maintenance
mengxiong10/vue2-datepicker A datepicker and datetimepicker UI component library for Vue 2 applications. It supports date, datetime, and range selection with theming v…	23	1514	maintenance
jayZheng87/Thusy Thusy is a Java general-purpose utility library that aggregates and extends helper classes on top of Hutool and Apache Commons. It provides…	32	1509	maintenance
OCNYang/QBox QBox (小秋魔盒) is an open-source Android life-tool app built with RxJava, Retrofit, OkHttp, and Glide. It bundles modules for news, articles, …	10	1379	maintenance
jingle1267/android-utils A Java utility class library for Android development that bundles dozens of commonly used helper classes covering files, bitmaps, networkin…	32	1322	maintenance
brson/stdx stdx is a curated meta-crate collecting the best-known Rust crates ('the missing batteries of Rust'), bundling libraries like serde, regex,…	35	2083	abandoned