Richard Sweeney

This plugin makes adding a PayPal button to your site or blog very easy. There is no complicated shortcut syntax to remember (or to teach a client).
You can select on which type of post (including custom post types) you’d like to display the button.
There is a settings page for default values (username, currency etc), which can be customized for individual posts. (This might come in for sites with multiple users).
Choose from four custom button themes (with custom button text): light, dark, blue and red. If you prefer, you can simply display a standard large or small PayPal button.
Your PayPal username is converted to HTML entities so it can’t (easily) be harvested for spam by species 8472, or any passing Sith lord. It’s not a foolproof method, but it helps.
This plugin is created for WordPress 3.x and supports ‘Buy Now’ and ‘Donation’ functionality.

Easy PayPal Custom Fields

Easily add a PayPal 'donate' or 'buy now' button to your site.

ekogoren

A simple, elegant, responsive and extensive solution for accepting Paypal donations at your WordPress site. Choose between a preferred currency and a multi-currencies selection drop down, and let your visitor decide on the amount, while still at your site. The plugin is 100% translatable and the Paypal payment page will be presented automatically in the same language as your website pages. The form can be used by drag&drop in the widget areas, via a short code in the posts and pages of your site or hardcoded by calling a function anywhere in your website. 
More on: http://http://plugins.dgcult.com/exq
<ul>
<li>Easy setup.</li>
<li>100% translatable.</li>
<li>Choose a default currency or allow your visitors to choose from a multiple currencies drop down (up to 22 different currencies).</li>
<li>An html5 amount field will let your visitors decide how much they would like to donate.</li>
<li>The PayPal payment page will automatically display according to the native language of your website (25 different languages supported).</li>
<li>Easily design your donation form using the UI color picker and a visual button image selection.</li>
<li>Further css design can be easily done with a convenient classes and id\’s system.</li>
<li>3 simple ways to integrate the donation option – Widget, short code, function.</li>
<li>Choose what page your visitor will be referred to when the payment has been completed.</li>
<li>You will need to have your own PayPal account (creating a PayPal account is free).</li>
</ul>

Exquisite PayPal Donation

The perfect solution for enabling PayPal donations at your WordPress site.

Easy PayPal Custom Fields vs Exquisite PayPal Donation