ArcGIS API 3.7 for Flex released November 25, 2014

[BjornSvensson]

Version 3.7, the last planned release of ArcGIS API for Flex and ArcGIS Viewer for Flex has been released today - http://blogs.esri.com/esri/arcgis/2014/11/25/arcgis-for-flex-3-7-released/.

[JamesConley1]

What would you suggest as a replacement for ArcGIS viewer
for Flex? 

[RobertScheitlin__GISP]

James,

  I know you addressed this to Bjorn, but my suggestion is Web AppBuilder. It is currently in Beta 3 but will be released in conjunction with ArcGIS 10.3. It is modeled after ArcGIS Viewer for Flex and is JavaScript API based. Developers like myself have already started work on widgets for this product.

Here is a live preview site for my WAB eSearch widget (which will give you a feel for the WAB StemApp).

eSearch Widget Live Preview Site

And here is the GeoNet space for Web AppBuilder for ArcGIS‌ and Web AppBuilder Custom Widgets‌