Standy by Leigh Taylor, via Behance. Concept for intranet. Check the location for other screenshots, concept drawings and other design materials.
SharePoint 2013 Mobile Intranet, from presentation by Joel Oleson.
The New SMU (Southern Methodist University) Intranet design by Muhammad Nurazhan Moin.
The "intranet" app for employees of London Heathrow Airport. Nice case study from Simply Communicate.
Landmark Group Intranet Mobile App - Email Design by Vener Sarmiento, via Behance
Mobile intranet for NATS. (Air traffic solutions and airport performance)
The mobile interface of the open source intranet of the City of Malmo, Sweden. There are many more screenshots when you click the link!
Balfour-Beatty's mobile news app. More screenshots in the article.
Mobile screen for Igloo Intranet
Nice Task List on Sling Mobile Intranet