Crescendo supports all documents, videos, music, web links and other file types supported by iOS and Android.
That includes .PDF, .DOC, .EPUB, .DOCX, . PPT, .PPTX, .XLS, .XLSX, .Pages, .Keynote, .Numbers, .HTML, .RTF, H.264, MP4, M4V, MOV, .MPEG-4, .M-JPEG, .WAV, .MP3, .MP4, .M4A, .AAC, .AIF, .AIFF, .AC3, .ATDS, .M4R, .BMP, .JPG, .GIF, .TIFF, .PNG and many more!
If a file type is specialized (i.e. CAD files) and not supported by Crescendo, you can still open it from within Crescendo using an external app installed on your device.