Please prepare annotations either in ELAN or in Praat.
The ELAN software for aligning transcriptions and annotations with video and audio is available from The Language Archive at the Max Planck Institute for Psycholinguistics.
When you submit ELAN eaf files, please also submit the corresponding pfsx file that ELAN creates to ensure that other users can view the annotation in the same way you arranged it, in terms of the position and order of tiers, font sizes, colours, etc.
The Praat software for detailed phonetic annotation of audio files is available from the Department of Phonetic Sciences at the University of Amsterdam
Note that Praat annotations can also be imported into ELAN and then saved as ELAN annotations.