smal

A plugin to add custom jQuery effects. You can also activate multiple effects at the same time.
Effects currently present: 
1. Snow: a simple effect to make it snow on the site and make the snow pile up at the bottom, also placing a couple of snowmen in the corners of the screen; 
2. Background-changer: you can change the background of the site randomly with images present in the plugin; 
3. Santa Claus: make Santa Claus pass through the bottom of the screen with a wave-like motion; 
4. Befana: make the Befana pass through the top of the screen with a wave-like motion; 
5. Karaoke: scroll the lyrics of the song “Santa Clause is coming to town” with a karaoke effect; 
6. Valentine’s Day: a simple word “Love” with a little heart to make appear on Valentine’s Day.
Other effects will be added in the next versions in progress.
Italiano: 
Un plugin per aggiungere effetti jQuery personalizzati. Puoi anche attivare più effetti contemporaneamente.
Effetti attualmente presenti: 
1. Neve: un semplice effetto per far nevicare sul sito e far accumulare la neve in basso, posizionando anche un paio di pupazzi di neve negli angoli dello schermo; 
2. Cambia-sfondo: puoi cambiare lo sfondo del sito in modo casuale con le immagini presenti nel plugin; 
3. Babbo Natale: fai passare Babbo Natale nella parte inferiore dello schermo con un movimento ondulatorio; 
4. Befana: fai passare la Befana nella parte superiore dello schermo con un movimento ondulatorio; 
5. Karaoke: fai scorrere il testo della canzone “Santa Clause is coming to town” con un effetto karaoke; 
6. San Valentino: una semplice parola “Love” con un cuoricino da far apparire il giorno di San Valentino.
Altri effetti saranno aggiunti nelle prossime versioni in corso.

jQ Enchanter

Good

Enable jQuery effects with On/Off switch from admin panel.

Alex Mills

DISCONTINUATION NOTICE: Development on this plugin has ceased in favor of the carousel module in the <a href="https://wordpress.org/extend/plugins/jetpack/" rel="ugc">Jetpack plugin</a>. I recommend you use that plugin instead — it’s much more full featured.
Makes the native WordPress galleries use a lightbox script called <a href="http://colorpowered.com/colorbox/" rel="nofollow ugc">ColorBox</a> to display the fullsize images right there in the page. No modifications required.
You can also make single non-<code>[gallery]</code> images use the lightbox by giving their links a class of “lightbox”, like so:
<pre><code><a href="..." class="lightbox"><img src="..." alt="..." /></a>
</code></pre>

jQuery Lightbox For Native Galleries

Makes the native WordPress galleries use a lightbox script called ColorBox to display the fullsize images.

jQ Enchanter vs jQuery Lightbox For Native Galleries