Alpine PhotoTile for Picasa and Google Plus is a free wordpress plugin to display Picasa and Google Plus images in a sidebar, post, or page.
Main features:
Display Picasa and Google Plus images in a sidebar, post, or page
Multiple styles to allow for customization
Lighbox feature for interactive slideshow (Fancybox, prettyBox, or ColorBox)
Widget & shortcode options
Feed caching/storage for improved page loading
To install Alpine PhotoTile for Picasa and Google Plus
Login to wordpress (wp-admin).
In your admin dashboard click plugins and select Add New.
Type Alpine PhotoTile for Picasa and Google Plus in the search field and click Search Plugins button.
Install Alpine PhotoTile for Picasa and Google Plusa.
After the successfully Installation click the activate Plugin link to activate the plugin.
[OR]
Download Alpine PhotoTile for Picasa and Google Plus wordpress plugin. Download link
http://wordpress.org/extend/plugins/alpine-photo-tile-for-picasa-and-google-plus/
Unzip and upload it to your WordPress wp-content/plugins directory.
Login to wp-admin. In your admin dashboard click plugins and activate the Alpine PhotoTile for Picasa and Google Plus wordpress plugin.