File Viewer and Reader - allows you to view files of various formats from your disk and dropbox.

Supported file formats:
Document - RTF, HTML, TXT and other text files.
Office - DOCX, XLSX, PPTX.
Book - PDF, EPUB, FB2, MOBI.
Comic - CBR, CBT, CBZ.
Audio - MP3, FLAC, WAV, MIDI.
Video - MP4, WEBM, OGG, AVI, MKV.
Image - GIF, PSD, SVG, PNG, JPG, JFIF, ICO.
3D - SWF (Flash), GLB, GLTF.