Cloud providers are elbowing each in the race for developers’ hearts and minds. This past week Sauce Lab rolled out a major upgrade to its application testing tool, Microsoft and Amazon updated their cloud offerings, and AppDirect acquired an SaaS solutions provider called Standing Cloud. In other news, Huddle added automatic file sync to its enterprise collaboration platform.

Sauce Labs offers a cloud-based toolkit that lets developers run Selenium and JavaScript unit tests for their applications across multiple platforms, including browsers and mobile devices. The company recently bolstered its service with a REST API and a reworked testing dashboard that introduces advanced reporting capabilities. The dashboard, or ‘reporting page,’ provides users with visibility into browser-specific errors, compatibility issues and other JavaScript test details.

Like Sauce Labs, Amazon and Microsoft are improving their clouds stacks in an effort to boost developer adoption. The competition between the two PaaS titans moved up to the caching layer last week after both companies unveiled updates to their on-demand caching services.

Amazon expanded ElastiCache with support for Redis, an open key-value store that stores data in-memory to accelerate performance. Microsoft in turn migrated its caching service to dedicated infrastructure in order to free up memory for applications.

Shortly after Amazon and Microsoft announced the updates, AppDirect revealed that it has acquired Standing Cloud, a privately-held provider of cloud application management platform. The company also disclosed that it has raised $9 million in Series B funding from iNovia Capital.

While the cloud titans compete over the application space, Huddle is working to increase its presence in the enterprise collaboration space. On Thursday, the firm rolled out a Connected Desktop function that lets users save files to the cloud directly from their desktop applications.