Helmi Technologies, a start-up that offers an open source platform for companies to produce AJAX applications, has raised $2.5 million, according to VentureWire (sub required).

The Finish company raised the money to open an office in Mountain View, where the company has now listed as its primary address.

See its announcement here. VentureWire notes:

…it is one of three AJAX-focused application toolkits to raise fresh capital in the past two months. Both Burlington, Mass.-based NexaWeb Technologies Inc. and San Mateo, Calif.-based Laszlo Systems Inc. have raised new rounds of funding to support a growing demand for rich Internet applications that are powered by AJAX.