Many of the major search engines still include a free submission section for their listings. Paid inclusion is always the faster choice, but if your budget is limited you may want to consider submitting and waiting the six to eight weeks (or more) that it often takes to see your listings show up. Bear in mind that if you have no budget it is still well worth submitting to the major search engines, as your site will be listed eventually.

Top 50 Major search engines providing free submissions include:
Google
Bing
cleversubmitter
Open Directory
ASR
ScrubTheWeb
SecretSELabs
Exactseek
FyberSearch
Anoox
SearchSight
FreePRWebDirectory
GhetoSearch
SoMuch
Web World
Viesearch
SonicRun
SWD
MasterMOZ
Link Centre
OneMission
Directory Free
1WebsDirectory
Online Society
Info Listings
Elite Sites Directory
Intelseek
Info Tiger
SurfSafety
OneMillionDirectory
Business Seek
GigaBlast
24/7 Web Directory
9 Sites
Nexus Directory
IllumiRate Submit
Amfibi
Gain Web
Polypat
DirectoryFire
SiteListings
YooFindit
Triple W Directory
W3 Catalog
ExaLead
DirectoryINT
The Great Directory