Tally Add-Ons Small Module TDL
You can download Trail Module in zip format. unzip it. Save it in tally folder. Open Tally->Gateway of Tally-> Control+Alter+T. ->F4(Local TDL).Enable Load TDL: Yes. Enter full name of TDL in list of TDL file box. For Example autobackup.tcp. Thats All TDL is active now.                             
Address Book
View List of Debtors/Creditors with address, contact detail,closing balance. You can export to excel and print the list
Big Font A4 Size
Print Company name address in big font in invoice. Suitable for big paper size (A4 or letter)
Big Font A5 Size
 Print Company name address in big font in invoice. Suitable for small paper size like A5)
Columnar Day Book
 View columnar day book: Sales,purchase,payment, receipt etc all vouchers in different column.
Party Previous Balance
Print Party previous balance in invoice. It will help in clearing outstanding.
Notes & Reminder
You can have your own notepad in tally and you can set date wise task reminder. It will remind at predefine date at the time of opening company. 
Dash Board
View single screen display of :P&L, Sale, Purchase, Cash, Bank, Outstanding, Capital, Loan,Top 5 Customer/supplier, Slow/fast moving items

 Detail Balance Sheet
 View Balance Sheet in detail mode. It will show all sub Group detail

Auto Backup
No more Tension of data loss/corruption. This addon takes your data backup every time you shut your tally at predefine location. Its a must have addon for everyone.
Crazy Color 
Gets bore with tally traditional colors? Change default color theme of tally and surprised others. 
Print Tax incl Rate 
Tax inclusive column shows in invoice screen but it dont print.  Using this addon you can Print Tax inclusive rate column in invoice.
Multiple Data Path
With the help of this addon you can set multiple path for your data. No need to type data path when you want to switch path.