Review Summary:
Dim Dim is a free and open source web meeting platform that is capable of handling almost any online meeting. If you're looking for an affordable online meeting solution that works across all platforms check out our top 3 online meeting services.
Pros: Free, open source, can handle up to 20 attendees (free version), works on PC and Mac
Cons: No application sharing, desktop sharing is limited (requires plug-in), recordings have poor quality, noticeable delays
Rating: 
| Pricing | Free (basic version). Pro version starts at $99/year, Enterprise starts at $1,998/year |
| Free Trial | NA |
| Meeting Capacity | 20 (basic version) |
| Desktop Sharing | Yes - limited desktop sharing capabilities. Requires a separate plug-in. No application-specific sharing. For application sharing we recommend GoToMeeting. |
| Desktop Recording | Yes - the recording quality is poor. Cannot record other attendees, or the whiteboard. |
| Web Teleconference | Yes - built-in VOIP |
| Phone Teleconference | Yes - uses third party service. |
| Control Granting | Yes - hosts can let others share |
| Video Conferencing | Yes - Two-way video |
| Private Chat | Yes - 1:1 private chat with anyone in the meeting. |
| Annotation Tools | Yes |
Free - If your meeting needs are simple and you don't need application-specific desktop sharing, Dim Dim can be a decent free alternative to other web conferencing solutions.
Open Source - Licensed under the GPL. Take a look under the hood to see how it works.
Mac and PC compatible - You can use Dim Dim from any PC, Mac, or Linux machine that supports flash.
Poor voice quality - The quality on VOIP calls isn't as good as GoToMeeting.
Video latency - There is a noticeable delay in video transmission.
Poor recording quality - DimDim has built-in recording, but the quality isn't very good. GoToMeeting has superior recording capabilities.
DimDim is a decent web conferencing application, but the performance, reliability, and security don't match GoToMeeting.