Just about any. The common ones you can choose from the list provided with TerminatorX (see below). Others, including future applications, that become a nuisance can be easily added. You can select any combination (one or more) of the following individual applications to block:
 

File sharing applications - possible illegal downloading (& prosecution), time-wasting, distracting, connection slowing, viruses and bandwidth consuming

Ares, Azureus, BadBlue, BearShare, BitComet, BitTorrent, Blubster, Cheetah, Crapster, DC++, Direct Connect, eDonkey, eMule, File Miner, File Navigator, FileShare, Filetopia, FlashGet, FreeWire, GLUZ, Gnotella, Gnucleus, Gnutella, GO MP3, Grokster, iMesh, KaZaA, LimeWire Morpheus, MP3DownloadCity.com, Mute, MyNapster, Napster, NeoNapster, Overnet, PHEX, Piolet, Prune Baby, Shareaza, SwapNut, Swapper, TrustyFiles, URLBlaze, uTorrent, Warez P2P, WinMP3Locator, WinMX, XoloX, Yaga

Messenger programs and websites - time-wasting, distracting, security implications and viruses

AIM Express, Aim Triton, AOL Instant Messenger, APNI.NET Messenger, Clientless Conversations, Centova Web Messenger, Cute Web Messenger, Dave's Messenger, Excite Messenger, eMessenger, Google Talk, ILoveIM, IM2 Messenger, Imaginarlo, Jabber, Meebo, Miranda, Mercury, Messenger Plus!, MSN Messenger, MSN Web Messenger, MSN2Go, MSNCP, MyEMessenger, PongoMSN, Private Message Plus, Regnessem, Scooper's Messenger, URMessenger, Windows Messenger, Yahoo! Messenger, Yahoo Web Messenger

Chat and video communication applications - time-wasting, distracting, security implications and viruses

All chat on Internet explorer, Almanak, AOL Chat rooms, Bebo, Chat House, Chatterbox, Easy IRC, Easy Message Express, Excite chat, ICQ, ICQ.com, ICQ2go, ICUII, JWChat, Lycos chat, MICA, mIRC, MSN Chat, MySpace, NetMeeting, Odigo, Orkut, Paltalk, Talk City, Trillian, Visual IRC, Worldvillage chat, Yahoo! Chat, Yak,

Internet phones - time-wasting, distracting, connection slowing and bandwidth consuming

Advanced Call Center, iConnectHere, Net2Phone, PC-Telephone, RealTunnel, Skype, StanaPhone

Keylogging and Stealth - security implications - can obtain users passwords, bank account details etc.

General keyloggers and sites, Remote Password Stealer, General Spying and Stealth

Miscellaneous application and Windows components - security implications, system corruption and viruses

Advanced Process Termination, America Online browser, BrowseAtWork.com, DOS box, Google Translator (cloaking), Guardster anonymous surfing, Internet Explorer (Microsoft), Idzap.com anonymous surfing, Microsoft Spy++, MultiProxy, Msconfig, Proxy Server List Hunter, Process Explorer, Process Suspender, Process Viewer, Proxify.com anonymous surfing, Regedit, Remote Havoc, Security Task Manager, Steganos Internet Anonym, Steganos Internet trace, System Restore, Sysinternals utilities, Task Manager, Time/Date (system clock), The cloak anonymous surfing, What's Running

Pornography - distracting and poor taste

General sites for pornography, Sex, XXX sites and X-rated

Casinos and Gambling - time-wasting, illegal in some places and distracting

General casino sites, General gambling sites, General betting sites, Poker sites, Baccarat sites, Blackjack and Punto Banco, Keno and bingo, Lottery sites

Auctions - time-wasting and distracting

General auction sites, Bidz, eBay, eBid, ePier, Half.com, QXL, uBid

Warez - illegal downloading (& prosecution), time-wasting, distracting, connection slowing, viruses and bandwidth consuming

General sites for Appz, Crackz, Serialz and Warez

Music players - time-wasting and distracting

MoodLogic Player, MusicMatch, RealOne Player, Sonique, Winamp, Windows Media Player

Web mail - time-wasting, distracting, security implications and viruses

Excite mail, Gmail, Hotmail, Lycos mail, Yahoo mail

Downloads - corrupting systems, illegal downloading (& prosecution), time-wasting, distracting, connection slowing, viruses and bandwidth consuming

iTunes, General downloads of software

On-line games - time-wasting, distracting and viruses

General online games, Games.com, Halftimegames.com, Hotgames, Kidzworld, Miniclip.com, MouseBreaker, MSN Games, PlaySite Games, Pogo.com, PopCap, QuickSnooker, Shockwave, .swf games, Yahoo! Games

Games - time-wasting and distracting

Hearts, Freecell, Internet Backgammon, Internet Checkers, Internet Hearts, Internet Reversi, Minesweeper, Pinball, Solitaire, Spider Solitaire

Sports News - time-wasting and distracting

General sports sites, BBC Sport, CBS SportsLine, EPSN.go.com, Fox Sports, Sky Sports, Sporting News, Sports Illustrated, Sportsnews.com, USA Today, Yahoo! Sports

Plus any others that you wish to add if you find that they are causing you a problem. Additions are easy to do for any programs or web sites not mentioned above - or that may be developed in the future.

Yes, you can ban any combination of the above applications. For example you could choose to block BitComet, MSN Messenger, ICQ, eBay, Casinos and iTunes.

TerminatorX can be used over Novell and NT server networks and also works with Windows workstations on a Unix network or Linux network. TerminatorX can be set up to work locally on portable computers and can be used on peer-to-peer network configurations that have no server.