What document management system integrates with Sage Timeslips?

I've tried to do research on the differences and similarities between Timeslips and TABS3 w/Practice Management.  We have an attorney who would really like to have a document management feature to use with the time and billing system.  Can someone tell me what program may work with Sage Timeslips for document management purposes.  Also, currently we use CITRIX for IT and server functions with our IT being offsite.  CITRIX doesn't play nice with TS sometimes and I have been informed that TS has never been tested inside the CITRIX environment.  What other options would we have for off site server/IT capabilities that integrates well with Timelips.