The RSForm!Pro OpenStreetMap Plugin is a plugin that once installed and enabled will allow you to add an OpenStreetMap field to your form.
RSJoomla
Mx maps module displays location with info of your choice in maps. It loads maps from OpenStreetMap and unlike google maps, works without need of any API key.
This OpenStreetMap custom field plugin for Joomla allows your users to easily set one or more markers/areas/maps to any Joomla item (supporting custom fields (Joomla articles, contacts etc...). In edition mode, it shows a map the editor can click to set a marker.
Add a Check-in (Foursquare.com like) feature to your EasySocial site.
JoomUltra World map is a most powerful interactive HTML5/Vector map for Joomla. You can use it to display countries/markers by fantastic way and easy to customize.
2022-03-12
Display Weather Forecasts of Current Time and Full Weeks of Any City / Zone You Want.
A nice module that allows you to display weather Forecasts of current time as well as Forecasts of full weeks. You can display of any zone of the World. You just need to put Area/City name and search. alternatively you can set Latitude and Longitude of any city. It will display the forecast in details. Weather conditions are available in different
This is a WordPress plugin in imitation of create so dense maps namely ye want, including interactive then colored markers, continents, nations or regions.
The Events Calendar Countdown Addon provides the ability to create Beautiful Countdown for The Events Calendar (by Modern Tribe) events with just a few clicks.
Vina Flat Weather for Joomla is a powerful weather module for Joomla 3 developed by VinaGecko that supports switching between two different weather API sources OpenWeatherMap.org or Yahoo. It allows you to display weather datas (with 5 View Type: Simple, Today, Partial, Forecast and Full) in beautiful layout. Temperature can be viewed in both Celsius and Fahrenheit mode. The module comes with an attractive flat UI css stylesheet,
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JUX Weather Forecast2.1.2 
JUX Weather Forecast is a beautiful, simple and feature rich weather module for Joomla. It allows you to interact with Weather.com to download and present all the latest local / international weather information on the go.
JUN Weather is an extension for Joomla! that helps users show weather on website easily with beautiful design.
This module get data source from http://openweathermap.com/ with accurate information weather forecast.
There are lots of parameters and you can set them easily. This awesome module is responsive and seo optimized.
2021-07-09JoomMap4.1.4 
JoomMap is a unique and comprehensive mapping solution for Joomla, you can create advanced map based directories easily. Define the content for each location using CCK functionality and give your users the ability to search and filter using familiar UI elements.
Geek OpenStreetMap Module allows you to easily integrate OpenStreetMap into your website. It comes with a simple-to-use back-end control panel and various advanced settings to help you be able to easily customize a map to fit your requirements.
Geek Google Map1.5.1 