Archiver v0.4.10 
Creates Archives (Zip, Tar) via Node Streams. Depends on Node's built-in zlib module for compression available since version 0.6.3.
Install
npm install archiver --saveYou can also use npm install https://github.com/ctalkington/node-archiver/archive/master.tar.gz to test upcoming versions.
Archiver
#create(type, options)
Creates an Archiver instance based on the type (ie zip/tar) passed. Can be passed to Archiver for convenience.
Instance Methods
#append(input, data, callback(err))
Appends a file to the instance. Input can be in the form of a text string, buffer, or stream. When the instance has received, processed, and emitted the input, the callback is fired.
Replaces #addFile which is in the depreciation stage and set to be remove in next release.
#finalize(callback(err, bytes))
Finalizes the instance. When the instance's stream has finished emitting, the callback is fired. This generally doesn't correspond to the end of the destination stream; though a solution to track the destination stream may come in a future release.
Zip
Options
comment string
Sets the zip comment.
forceUTC boolean
If true, forces the file date and time to UTC. Helps with testing across timezones.
zlib object
Passed to node's zlib module to control compression. Options may vary by node version.
File Data
name string required
Sets the file name including internal path.
date string|Date
Sets the file date. This can be any valid date string or instance. Defaults to current time in locale.
store boolean
If true, file contents will be stored without compression.
comment string
Sets the file comment.
Tar
Options
recordSize number
Sets the size (in bytes) of each record in a block, default is 512 (for advanced users only).
recordsPerBlock number
Sets the number of records in a block, default is 20 (for advanced users only).
File Data
name string required
Sets the file name including internal path.
date string|Date
Sets the file date. This can be any valid date string or instance. Defaults to current time in locale.
Things of Interest
Credits
Concept inspired by Antoine van Wel's node-zipstream.
Tar inspired by isaacs's node-tar.