jojaba

Simple Diary is meant to be simple enough to be used out of the box. Simple, but also powerfull and customizable. All skill user should find something to do with it.
Here’s the list of the settings (see screenshots for further infos):
<ul>
<li>Custom post type “reminder” available. The reminder infos : Title, start date (required), end date (optional), start time(optional), end time (optional), location (required), url (optionnal), article (optional). The date and time infos are set using <a href="http://amsul.ca/pickadate.js/" title="Go to the pickadate.js homepage" rel="nofollow ugc">pickadate.js</a> jQuery plugin. All the system (compose reminder page and datepicker) is responsive.</li>
<li>The admin reminders edit page is sorted by start date and contain title, start date, end date, location and creation/modification date. All columns are sortable except location column.</li>
<li>Option page will let you modify some settings : Title of the diary page, slug modification, reminder count listed in upcoming reminders, reminder count in diary, selection of the columns in edit page.</li>
<li>Possibility to add a reminder from a post (beginning with 1.3 plugin version)</li>
<li>All default WordPress themes (twentyten, twentyeleven, twentytwelve, twentythirteen, twentyfourteen) can easily be updated to take in account the reminders. You just have to get archive-reminder.php, content-reminder.php or loop-reminder.php, single-reminder.php from <code>/simple-diary/themes-support/your_theme/</code> and put it into your hteme folder (<code>/wp-content/themes/your-theme/</code>). You can take these files also as examples to customize Diary and reminders for your theme.</li>
<li>A “Upcoming reminders” widget is available in the admin widget section.</li>
</ul>
Simple Diary has been developed by keeping in mind following rules:
<ul>
<li>Easy to install, use and customize</li>
<li>Working on every theme (including responsive themes)</li>
<li>Adding microdata used to markup HTML code for semantic (so that most popular search providers can handle the infos).</li>
<li>Make it translatable (availabe languages : english and french).</li>
</ul>

Simple Diary for WordPress

A very simple diary listing user created reminders. Ready to use in WordPress default themes.

patrixsbs

Only in Portuguese (Brazil) yet… Others languages soon… 
This plugin aims to maintain a simple and efficient control of events and list 
them as a widget
Este plugin tem como objetivo manter um controle simples e eficiente de eventos 
de forma a listá-los como widget 
Enfim, a ideia desse plugin é oferecer uma opção eficiente para controle e listagem de 
eventos, o que atualmente é uma necessidade de muitos sites.
No futuro há a ideia de integrá-lo ao Google Calendar.
<h3>Uso</h3>
Use [list-events] para listar os eventos em um Post ou Pagina. 
Ou utilize as funcoes list_events() e get_events()
Mais informacoes no site oficial do projeto 
http://tempusproject.wordpress.com/

Tempus

Only in Portuguese (BR) yet. Others languages soon. Este plugin tem como objetivo manter um controle simples e eficiente de eventos

Simple Diary for WordPress vs Tempus