The interest in SalesForce.com's AppExchange never ceases to amaze me. New applications are added frequently, so if you're a SalesForce user and responsible for improving the user experience as well as the efficiency of your own business and marketing efforts, keeping up to date with new releases on Force.com is a smart move.

Below are five recently released (last 45 days or so) applications for Web professionals available to SalesForce.com users (these apps are mostly paid by the way) with a few alternatives thrown in for good measure:

ExactShip: This paid app helps to streamline operations for Internet retailers by managing all shipping from a single packing & shipping solution designed for high volume fulfillment. Supports all major US parcel carriers (UPS, FedEx, USPS & DHL) & more than 3000 LTL/TL freight carriers. Also see FedEx and UPS.

iContact: Email marketing with iContact for Salesforce allows you to create, send and track relevant and targeted email marketing without the need to learn a new application. This is a paid application bu there is no per-user fee. The app also provides results on messaging performance. See also the apps from Vertical Response, ExactTarget, Marketo and BlastWizard.

Bime: A BI application with some impressive visualization capabilities that mixes data from cloud and on-premise sources, allowing for the analysis of all data in one place. The app enables users to take data from SQL databases, Excel spreadsheets, and XML webservices and manipulate it to form predictive models. Also see GoodData Analytics and Sales Pipe Insight.

SalesForce for Google Adwords: Allows online marketers to track Google advertising campaigns and website lead generation activity. If you're looking to more deeply integrate and balance paid advertising insights with your CRM, this paid app (which is included with all SalesForce editions) is one to use. Search Marketers may also be interested in SEO for Salesforce and HubSpot Inbound Marketing Software.

Great Wave Surveys: A solid feedback management application to gather, analyze, and distribute customer feedback. The paid, fully native application enables users to receive real-time responses and utilize standard security permissions to control user access to feedback channel. Also see Timba, Survey Force, ClickTools and FormAssembly.