This is not an exhaustive list but it's a start and will no doubt be added to. You should also make sure that they are still active and also that your sim is allowed to advertise there (type of sim and age ratings)
Banner Exchanges
- Deep Space 93 Banner Exchange - possibly old
- MyStarship.com Banner Exchange
- Obsidian Fleet Banner Exchange
- RPG Life Banner Exchange
- Star-Fleet.org Banner Exchange
- StarTrekPBEM.net Banner Exchange
- Bravofleet Banner Exchange You need to register with the BF site before allowed access to Banner Exchange
(Link)Sites
- Disapora Promotion & Advertisements
- PBeMNexus Resources and advertising of all sim types
- PBeM 2.0
- PBEMplayers.com PBEM sites only
- PBEM-Portal.com
- Starfleet Version 8 Recruitment Center
- The Simming League Ads and Links
- PBM / PBEM List Index: startrek Scroll to bottom to add your sim
- RPG Gateway
- Scifimatter.com Online roleplay search engine
- Add Me! Submit your site to 14 search engines in one go
Topsites
- Disapora Top 50
- MyStarship.com 101 Sci-Fi Links
- Phantom Star.com Top 200 Star Trek Sites
- Starfleet Version 8 Top 100 Sites
- Worldwide Topsites
Forums
Webrings
- Bomis: The Television/Programs/Science Fiction/Star Trek/Web Rings ring
- PBeM-Portal.com Webring
- Ring Surf (search for Star Trek)
- Star Trek: ChronoWerx
- Star Trek One: RPG Webring
- StarTrekPBEM.net Webring
- Unofficial Star Trek PBEM Ring
- Web Ring (just do a search for Star Trek)
Yahoo Groups / Mailing Lists
- A List of RPGs (private) Requires users to log into to prove they are 18+
- Alpha Star Base (private)
- Alpha Star Base 2 (private)
- Gamers Spot RPG GAMERS (private)
- PBeM Network (private)
- Roleplayers Anon (public)
- Roleplaying Yellowpages (public)
- RPG Announcement (public)
- RPG Classified Ads (private)
- RPG Finder (private)
- The RPGamer's Den (public)
- RPG Host (private)
- RPG Online (public)
- RPG Player Sanctuary (private)
- RPG-Plug (public)
- RPG Promotions (public)
- RPGs 'R' Us (private)
- RPG SFF Casting (private)
- RPG Want Ads (public)
- Star Trek Simm's Recruiting Network (private)
- Star Trek Simmers (private)
- Star Trek Simming Add Center (public)
- Starfleet's Recruitment Centre (public)
- Starlight Role Players Guild (public)
- Starship Recruitment Center (public)
- The RPG Advert Page (private)
- The Universal RPG Recruiting Network (public) <-- looks great
- UFP Recruitment Center (public)
- UFP Starleet Simming HQ (public)
Note: Sometimes Yahoogroups / Mailing Lists aren't the best places to advertise as, a lot of the time, the only people who look at them are people, like you, only looking to advertise their own sims. However, the ones that have public viewing enabled are better.
Note
This is simply a secondary copy of the resource provided by Capricorn Group