can anyone send me the link of arcgis api for flex plz
retired according to te link ArcGIS API for Flex | ArcGIS for Developers
I'm not sure that this page is still supposed to be out there, but I found the older version downloads here (2.5 and earlier).
http://resources.arcgis.com/content/arcgis-flex-api-download
edit:
....and this blog has some links of the source on github at the end of the article.
Version 3.1 of ArcGIS API for Flex and ArcGIS Viewer for Flex Released | ArcGIS Blog
ArcGIS Flex API has already retired, and that's why you can't the download link from Esri page. If you still want to find one online, you can try to google "arcgis_api_for_flex_3_7" to see if there is any result.
You can find the Flex Viewer 3.7 available through this github page: Releases · Esri/arcgis-viewer-flex · GitHub
We recommend to move forward to JavaScript or any other Quartz Runtime SDK for developing new application.