There are a plethora of enterprise friendly collaboration platforms to choose from these days, with Yammer, Salesforce, Jive, Bantam Live, Socialcast, and others all vying for marketshare. All of the offerings are compelling but now more than ever, the startups and companies that develop these platforms are facing pressure to make their offerings the most appealing and feature-rich. Today, Socialtext, the developer of an enterprise social software platform built around microblogging, is rolling out a more powerful version, called Socialtext 4.0, of its collaboration applications.

One of the features users were asking for was the ability to create groups within their Socialtext applications. So now, you can create collaborative groups within your Socialtext app, that comes with a group home page including an activity stream of group member updates, a dedicated microblogging channel, and one or more workspaces. Collaborative Groups can be synced with other groups and can also be configured for privacy needs. A group can be listed, with its membership designated as either “request-to-join” or open. Alternatively, a group can be unlisted, which makes it completely private.

Users can now view the activity streams of any group that they belong too and can also filter the stream, by individual, the people you follow or see the stream of all the employees in the company. Users can also choose to publish their “Signals,” which are the Twitter-like short message sent on Socialtext, to one group or all the groups they belong to.

And, Socialtext has enhances search in the this new version, providing users the ability to browse and search messages sent by employees in a company. You can also filter your search by group or topic and see threaded conversations. As with many mircoblogging networks, you can now hover over a person’s avatar to see their presence, which lets teammates know who is reachable at a given moment.

Socialtext 4.0 is available on all of Socialtext’s deployment options, including its on-site managed appliance, desktop application,, mobile apps and web-based product. Socialtext’s collaboration tool has a freemium model and a paid service.

Socialtext’s offering is compelling for many businesses because of its on-premise offerings that provides security options unavailable in its cloud-based competitors. But as many companies are increasingly comfortable with placing their business operations and communication in the cloud, its wise for Socialtext to build out its platform to offer more functionality.

In 2008, productivity suite empire Zoho launched a simple invoicing tool, unsurprisingly called Zoho Invoice. Today, the startup is releasing a new version of its Invoice, dubbed Invoice 2.0, that has a fresh user interface and provides a more open application.

The fact is that over the past two years, there have been a plethora of online invoicing startups that have popped up and Zoho is catching up to its competitors with version two of its offering. With this update, Zoho has redesigned its UI making it easier to navigate and customize to fit the look and feel of a business’ design. Zoho Invoice will also allow users to record separate expenses they incur while serving particular clients (like travel, material etc).

The version also has full organization, multi-user support so that several employees can access and collaborate on invoices for a particular account. And Zoho has opened up the API for Invoices to that developers can integrate the application into their own applications. Additionally, Zoho features useful bells and whistles such as multi-currency support and email history which tracks your email exchanges with your clients and other users.

The plus of using Zoho’s invoicing application is that it ties into its other productivity applications seamlessly. And its affordable, with a free version and the most expensive version coming in at $35 per month. Last year, we wrote that Zoho has continued to implement an intelligent strategy to launch new products and add-ons to its existing offerings, partly to keep users from flocking to Google Apps and Microsoft’s Web-based version of Microsoft 2010. It looks like Zoho is continuing this strategy in 2010.

Last year, startup unveiled a new version of Zoho Reports; launched a deeper integration with Google Docs; rolled out Zoho Discussions, a online forum tool for businesses; and debuted Zoho Recruit.

And over the past two years, Zoho has added support for Sharepoint, mobile, Google and Yahoo IDs and group sharing. According to out latest states, Zoho has definitely reached over 2 million users is even catching the attention of its competition. Hopefully, 2010 will be as fruitful as 2009.