The C language, which displaced Java as the most popular language in the Tiobe Programming Community monthly assessment in April, has maintained its number 1 spot in the May report released this week. But a high-profile member of the PHP community is questioning the accuracy of the index itself.

Microsoft's C# language appears set to overtake C++ in regard to its popularity with developers, a monthly survey of programming languages finds. But the language could be held back because C++ is better for mobile application development, an official in charge of the survey said.

Although slipping slightly in usage from a year ago, Java has still held steady as the most popular programming language in Tiobe Software's monthly index on which languages are holding the most traction with developers.

Microsoft is extending its "Community Promise" patent licensing to C# programs and Common Language Infrastructure (CLI), enabling open source usage of the technologies without fear of any reprisals.

Microsoft will converge features of Visual Basic and C# languages with planned upgrades to the two platforms, a Microsoft official said this week.

Telstra and Microsoft have announced a partnership to bring hosted mobile application and unified communication services to small businesses, including its own souped-up version of Windows Mobile developed locally.